5.5.0 | curl_setopt | Introduced CURLOPT_SHARE. |
| curl_setopt | Added the cURL resource as the first argument to the
CURLOPT_PROGRESSFUNCTION callback. |
| empty | empty now supports expressions, rather than only
variables. |
| gd_info | WebP Support added. |
| imagerotate | This function is now affected by the interpolation method set by the
imagesetinterpolation function. |
| iterator_to_array | iterator_to_array gained support for key types
other than integer and string when the
use_keys parameter is enabled. |
| json_encode | depth parameter was added. |
| mysql_connect | This function will generate an E_DEPRECATED
error. |
| mysql_db_name | The mysql_list_dbs function is deprecated,
and emits an E_DEPRECATED level error. |
| mysql_pconnect | This function will generate an E_DEPRECATED
error. |
| mysql_tablename | The mysql_tablename function is deprecated,
and emits an E_DEPRECATED level error. |
| pack | The "Z" code was added with equivalent functionality to "a" for Perl
compatibility. |
| php_logo_guid | php_logo_guid has been removed from PHP. |
| phpinfo | Logo GUIDs were replaced with data URIs, and so turning off expose_php
now has no effect on the result of phpinfo(). Credits are also now
embedded within the output itself instead of linked. |
| preg_replace | The /e modifier is deprecated. Use
preg_replace_callback instead. See the
PREG_REPLACE_EVAL
documentation for additional information about security risks. |
| set_error_handler | error_handler now accepts NULL. |
| set_exception_handler | Previously, if NULL was passed then this function returned TRUE.
It returns the previous handler since PHP 5.5.0. |
| setcookie | A Max-Age attribute is now included in the Set-Cookie header sent to
the client. |
| setrawcookie | A Max-Age attribute is now included in the Set-Cookie header sent to
the client. |
| unpack | Changes were made to bring this function into line with Perl:
The "a" code now retains trailing NULL bytes.
The "A" code now strips all trailing ASCII whitespace (spaces, tabs,
newlines, carriage returns, and NULL bytes).
The "Z" code was added for NULL-padded strings, and removes trailing
NULL bytes. |
| zend_logo_guid | zend_logo_guid has been removed from PHP. |
| mysqli::commit | Added flags and name
parameters. |
| mysqli::options | The MYSQLI_SERVER_PUBLIC_KEY option was added. |
| mysqli::rollback | Added flags and name
parameters. |
| SoapClient::SoapClient | New ssl_method option. |
5.4.0 | DOMDocument::loadHTML | Added options parameter. |
| DOMDocument::loadHTMLFile | Added options parameter. |
| apache_child_terminate | This function became available under FastCGI. Previously, it was
supported only when PHP was installed as an Apache module. |
| apache_request_headers | This function became available under FastCGI. Previously, it was
supported only when PHP was installed as an Apache module. |
| apache_response_headers | This function became available under FastCGI. Previously, it was
supported only when PHP was installed as an Apache module. |
| array_combine | Previous versions issued E_WARNING and returned
FALSE for empty arrays. |
| array_multisort | The SORT_NATURAL and SORT_FLAG_CASE
were added to array1_sort_flags as possible sort flags. |
| date_default_timezone_get | The timezone is no longer guessed from information available through the
operating system as the guessed timezone can not be relied on. |
| date_default_timezone_get | The TZ environment variable is no longer used to
guess the timezone. |
| debug_backtrace | Added the optional parameter limit. |
| debug_print_backtrace | Added the optional parameter limit. |
| dns_get_record | Added raw parameter. |
| empty | Checking non-numeric offsets of strings returns TRUE. |
| error_reporting | E_STRICT became part of E_ALL. |
| filter_input_array | Added add_empty parameter. |
| filter_var_array | Added add_empty parameter. |
| get_html_translation_table | The default value for the encoding parameter was
changed to UTF-8. |
| get_html_translation_table | The constants ENT_HTML401, ENT_XML1,
ENT_XHTML and ENT_HTML5 were added. |
| get_magic_quotes_gpc | Always returns FALSE because the magic quotes feature was removed from PHP. |
| get_magic_quotes_runtime | Always returns FALSE because the magic quotes feature was removed from PHP. |
| getallheaders | This function became available under FastCGI. Previously, it was
supported only when PHP was installed as an Apache module. |
| gzcompress | Added encoding parameter. |
| gzdeflate | Added encoding parameter. |
| gzencode | FORCE_DEFLATE now generates RFC 1950 compliant
output. |
| hash | The tiger algorithm now uses big-endian byte ordering. |
| hash_algos | Support for joaat, fnv132 and fnv164 was added. Support for Salsa10 and Salsa20 was removed. |
| html_entity_decode | Default encoding changed from ISO-8859-1 to UTF-8. |
| html_entity_decode | The constants ENT_HTML401, ENT_XML1,
ENT_XHTML and ENT_HTML5 were added. |
| htmlentities | The default value for the encoding parameter was
changed to UTF-8. |
| htmlentities | The constants ENT_SUBSTITUTE, ENT_DISALLOWED,
ENT_HTML401, ENT_XML1,
ENT_XHTML and ENT_HTML5 were added. |
| htmlspecialchars | The default value for the encoding parameter was
changed to UTF-8. |
| htmlspecialchars | The constants ENT_SUBSTITUTE, ENT_DISALLOWED,
ENT_HTML401, ENT_XML1,
ENT_XHTML and ENT_HTML5 were added. |
| htmlspecialchars_decode | The constants ENT_HTML401, ENT_XML1,
ENT_XHTML and ENT_HTML5 were added. |
| http_build_query | The enc_type parameter was added. |
| imagecolorset | The alpha parameter was added. |
| isset | Checking non-numeric offsets of strings now returns FALSE. |
| json_decode | The options parameter was added. |
| json_encode | JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, and JSON_UNESCAPED_UNICODE options were added. |
| mb_encode_numericentity | Added is_hex parameter. |
| number_format | This function now supports multiple bytes in
dec_point and
thousands_sep. Only the first byte of each
separator was used in older versions. |
| ob_start | The third parameter of ob_start changed from a
boolean parameter called erase
(which, if set to FALSE, would prevent the output buffer from being
deleted until the script finished executing) to an
integer parameter called flags.
Unfortunately, this results in an API compatibility break for code
written prior to PHP 5.4.0 that uses the third parameter. See
the flags example
for an example of how to handle this with code that needs to be
compatible with both. |
| ob_start | A chunk size of 1 now results in chunks of 1 byte
being sent to the output buffer. |
| openssl_decrypt | The raw_output was changed to options. |
| openssl_encrypt | The raw_output was changed to options. |
| preg_match_all | The matches parameter became optional. |
| scandir | sorting_order constants
were added. Any nonzero value caused descending order in previous versions. So
for all PHP versions, use 0 for ascending order, and 1
for descending order. An option for SCANDIR_SORT_NONE behavior did not
exist prior to PHP 5.4.0. |
| session_set_save_handler | Added SessionHandlerInterface for implementing session handlers and
SessionHandler to expose internal PHP session handlers. |
| snmp_set_valueretrieval | Constants SNMP_VALUE_PLAIN or SNMP_VALUE_LIBRARY
may be combined with SNMP_VALUE_OBJECT
resulting different way of representing contents of value
array element in return value of GET-function. If no
SNMP_VALUE_{PLAIN,LIBRARY} constant is
accompanying SNMP_VALUE_OBJECT,
SNMP_VALUE_LIBRARY is used.
Prior to 5.4.0 SNMP_VALUE_OBJECT effecively meant
SNMP_VALUE_OBJECT|SNMP_VALUE_PLAIN. |
| sort | Added support for SORT_NATURAL and
SORT_FLAG_CASE as sort_flags |
| Phar::setStub | Added len parameter. |
| PharData::setStub | Added len parameter. |
| SimpleXMLElement::getDocNamespaces | Added from_root parameter. |
| SoapClient::SoapClient | New keep_alive option. |
5.3.0 | DateTime::__construct | If time contains an invalid
date/time format, then an
exception is now thrown. Previously an error was emitted. |
| DateTime::modify | Changed the
return value on success from NULL to DateTime. |
| DateTime::setDate | Changed the
return value on success from NULL to DateTime. |
| DateTime::setISODate | Changed the
return value on success from NULL to DateTime. |
| DateTime::setTime | Changed the
return value on success from NULL to DateTime. |
| DateTime::setTimezone | Changed the
return value on success from NULL to DateTime. |
| DateTimeZone::getTransitions | The optional timestamp_begin and timestamp_end
were added. |
| DateTimeZone::listIdentifiers | Added the optional what and
country parameters. |
| DirectoryIterator::__construct | Throws UnexpectedValueException if the
path cannot be opened. |
| acosh | This function is now available on all platforms |
| array_multisort | The SORT_LOCALE_STRING was added to
array1_sort_flags as possible sort flags. |
| array_reduce | Changed initial to allow mixed, previously integer. |
| array_search | As with all internal PHP functions as of 5.3.0,
array_search returns NULL if invalid parameters
are passed to it. |
| asinh | This function is now available on all platforms |
| atanh | This function is now available on all platforms |
| call_user_func | The interpretation of object oriented keywords like parent
and self has changed. Previously, calling them using the
double colon syntax would emit an E_STRICT warning because
they were interpreted as static. |
| call_user_func_array | The interpretation of object oriented keywords like parent
and self has changed. Previously, calling them using the
double colon syntax would emit an E_STRICT warning because
they were interpreted as static. |
| checkdnsrr | This function is now available on Windows platforms. |
| clearstatcache | Added optional clear_realpath_cache
and filename parameters. |
| copy | Added context support. |
| crypt | PHP now contains its own implementation for the MD5 crypt, Standard DES,
Extended DES and the Blowfish algorithms and will use that if the system
lacks of support for one or more of the algorithms. |
| curl_setopt | Introduced CURLOPT_PROGRESSFUNCTION. |
| date_default_timezone_set | Now throws E_WARNING rather than
E_STRICT. |
| define_syslog_variables | This function now throws an E_DEPRECATED notice. |
| dl | dl is now disabled in some SAPIs due to
stability issues. The only SAPIs that
allow dl are CLI and Embed. Use
the Extension Loading
Directives instead. |
| dns_get_record | Prior to this release, if the authns parameter
was given, the addtl parameter was also
required. |
| dns_get_record | This function is now available on Windows platforms. |
| error_reporting | E_DEPRECATED and E_USER_DEPRECATED introduced. |
| exif_imagetype | Added icon support. |
| expm1 | This function is now available on all platforms |
| fgetcsv | The escape parameter was added |
| fnmatch | This function is now available on Windows platforms. |
| func_get_arg | This function can now be used in parameter lists. |
| func_get_arg | If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns FALSE. |
| func_get_args | If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns FALSE. |
| func_get_args | This function can now be used in parameter lists. |
| func_num_args | This function can now be used in parameter lists. |
| func_num_args | If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns -1. |
| gd_info | JPG Support attribute renamed to JPEG Support. |
| get_cfg_var | get_cfg_var was fixed to be able
to return "array" ini options. |
| get_class | NULL became the default value for object,
so passing NULL to object now has the same
result as not passing any value. |
| get_defined_constants | Core constants are categorized under Core,
previously internal. On Windows, the Core Constants
are categorized under mhash. |
| get_object_vars | This function now returns NULL if the
object isn't an object. Previously FALSE was returned. |
| getimagesize | Added icon support. |
| getmxrr | This function is now available on Windows platforms. |
| getopt | Added support for "=" as argument/value separator. |
| getopt | Added support for optional values (specified with "::"). |
| getopt | Parameter longopts is available on all systems. |
| getopt | This function is no longer system dependent, and now works on Windows, too. |
| hash_algos | Support for md2, ripemd256, ripemd320, salsa10, salsa20, snefru256 and sha224 was added |
| htmlentities | The constant ENT_IGNORE was added. |
| htmlspecialchars | The constant ENT_IGNORE was added. |
| imagecolorclosesthwb | This function is now available on Windows |
| imagefilter | Pixelation support (IMG_FILTER_PIXELATE) was added. |
| inet_ntop | This function is now available on Windows platforms. |
| inet_pton | This function is now available on Windows platforms. |
| ini_get | Previously, the empty string was returned if the configuration
option didn't exist. now, FALSE is returned instead. |
| ini_get_all | Added details. |
| is_a | This function is no longer deprecated, and will therefore
no longer throw E_STRICT warnings. |
| json_decode | Added the optional depth. The default recursion depth was increased from 128 to 512 |
| json_encode | The options parameter was added. |
| link | This function is now available on Windows platforms (Vista, Server
2008 or greater). |
| linkinfo | This function is now available on Windows platforms (Vista, Server
2008 or greater). |
| log1p | This function is now available on all platforms |
| mb_get_info | The entry "http_output_conv_mimetypes" was made available. |
| mcrypt_create_iv | MCRYPT_DEV_RANDOM and
MCRYPT_DEV_URANDOM became available on Windows
platforms. |
| mcrypt_create_iv | It is no longer required to call srand first. This
is now done automatically. |
| mktime | mktime now throws E_DEPRECATED notice
if the is_dst parameter is used. |
| mysql_db_query | This function now throws an E_DEPRECATED notice. |
| mysql_escape_string | This function now throws an E_DEPRECATED notice. |
| nl2br | Added the optional is_xhtml parameter. |
| parse_ini_file | Added optional scanner_mode parameter.
Single quotes may now be used around variable assignments.
Hash marks (#) may no longer be used as comments
and will throw a deprecation warning if used. |
| pg_lo_create | The optional object_id was added. |
| pg_lo_import | The optional object_id was added. |
| preg_quote | The - character is now quoted |
| property_exists | This function checks the existence of a property independent of
accessibility. |
| rawurlencode | Now conforms to RFC 3986. |
| readlink | This function is now available on Windows platforms (Vista, Server
2008 or greater). |
| realpath | Prior to this release, if only the last path
component did not exist, realpath would not fail on
*BSD systems. realpath now fails in this case. |
| register_tick_function | Ticks are now supported on threaded web server modules. |
| round | The mode parameter was introduced. |
| session_start | If a session fails to start, then FALSE is returned.
Previously TRUE was returned. |
| setlocale | This function now throws an E_DEPRECATED notice if a string is passed
to the category parameter instead of one of the
LC_* constants. |
| shm_attach | This function now returns a resource instead of an
integer. |
| socket_create_pair | This function is now re-enabled on Windows platforms. |
| spl_autoload_register | The prepend parameter was added. |
| spl_autoload_register | Namespaces support was introduced. |
| stream_context_create | Added the optional params argument. |
| stream_socket_pair | This function is now available on Windows platforms. |
| stristr | Added the optional parameter before_needle. |
| strlen | Prior versions treated arrays as the string Array, thus returning
a string length of 5 and emitting an E_NOTICE level error. |
| strstr | Added the optional parameter before_needle. |
| strtotime | Prior to PHP 5.3.0, relative time formats supplied to the
time argument of strtotime
such as this week, previous week,
last week, and next week were
interpreted to mean a 7 day period relative to the current date/time, rather
than a week period of Monday through Sunday. |
| strtotime | Prior to PHP 5.3.0, 24:00 was not a valid format and
strtotime returned FALSE. |
| sybase_connect | The new parameter was added. |
| symlink | This function is now available on Windows platforms (Vista, Server
2008 or greater). |
| time_nanosleep | This function is now available on Windows platforms. |
| time_sleep_until | This function is now available on Windows platforms. |
| touch | It became possible to change the modification time of a directory
under Windows. |
| mysqli::__construct | Added the ability of persistent connections. |
| mysqli::query | Added the ability of async queries. |
| ReflectionFunction::__construct | name can now be a closure. |
| SplObjectStorage::attach | Added the data parameter. |
5.1.0 | DirectoryIterator::__construct | Throws RuntimeException on error.
Previously, threw Exception. |
| DOMDocument::save | Added the options parameter |
| DOMDocument::saveXML | Added the options parameter |
| class_implements | Added the option to pass the class parameter as
a string. Added the autoload parameter. |
| class_parents | Added the option to pass the class parameter as
a string. Added the autoload parameter. |
| ctype_digit | Before PHP 5.1.0, this function returned TRUE
when text was an empty string. |
| curl_setopt | Introduced CURLOPT_AUTOREFERER,
CURLOPT_BINARYTRANSFER,
CURLOPT_FTPSSLAUTH,
CURLOPT_PROXYAUTH, and
CURLOPT_TIMECONDITION. |
| date | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| date | The valid range of a timestamp is typically from Fri, 13 Dec
1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT. (These are
the dates that correspond to the minimum and maximum values for
a 32-bit signed integer). However, before PHP 5.1.0 this range was limited
from 01-01-1970 to 19-01-2038 on some systems (e.g. Windows). |
| date_sunrise | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| date_sunset | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| explode | Support for negative limits was added |
| file_get_contents | Added the offset and
maxlen parameters. |
| file_put_contents | Added support for LOCK_EX and the ability to pass
a stream resource to the data parameter |
| get_parent_class | If called without parameter outside object, this function would have
returned NULL with a warning, but now returns FALSE. |
| gettimeofday | The return_float parameter was added. |
| glob | GLOB_ERR was added |
| gmdate | The valid range of a timestamp is typically from Fri, 13 Dec
1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT. (These are
the dates that correspond to the minimum and maximum values for
a 32-bit signed integer). However, before PHP 5.1.0 this range was limited
from 01-01-1970 to 19-01-2038 on some systems (e.g. Windows). |
| gmmktime | As of PHP 5.1.0, the is_dst parameter became
deprecated. As a result, the new timezone handling features should be used
instead. |
| idate | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| imagerotate | ignore_transparent was added. |
| intval | Throws E_NOTICE and
returns 1, when an object is passed to
var. |
| localtime | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| md5_file | Changed the function to use the streams API. It means that you can use
it with wrappers, like md5_file('http://example.com/..') |
| mktime | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| mktime | The is_dst parameter became deprecated.
Made the function return FALSE on error, instead of
-1.
Fixed the function to accept the year, month and day to be all passed
as zero. |
| mktime | When called with no arguments, mktime throws
E_STRICT notice. Use the
time function instead. |
| openssl_pkcs7_verify | The content parameter was added. |
| preg_replace | Added the count parameter |
| preg_replace_callback | The count parameter was added |
| session_regenerate_id | Added the delete_old_session parameter. |
| sha1_file | Changed the function to use the streams API. It means that you can use
it with wrappers, like sha1_file('http://example.com/..') |
| str_word_count | Added the charlist parameter |
| stream_copy_to_stream | Added the offset parameter |
| stream_filter_append | Prior to PHP 5.1.0, this function returns TRUE on success
or FALSE on failure. |
| stream_filter_prepend | Prior to PHP 5.1.0, this function returns TRUE on success
or FALSE on failure. |
| stream_get_contents | The offset was added. |
| strftime | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| strtotime | Now returns FALSE on failure, instead
of -1. |
| strtotime | Now issues the E_STRICT and E_NOTICE
time zone errors. |
| substr_compare | Added the possibility to use a negative offset. |
| substr_count | Added the offset and
the length parameters |
| var_export | Possibility to export classes and arrays containing classes using the
__set_state() magic
method. |
| XSLTProcessor::registerPHPFunctions | The restrict parameter was added. |
5.0.0 | apache_get_modules | Became available when using Apache 1, or the PHP Apache 2
filter API. Before this time, it was only
available when using the Apache 2 handler API. |
| apache_get_version | Became available with the Apache 2 filter API. |
| array_keys | Added the strict parameter. |
| array_merge | The behavior of array_merge was modified in PHP 5. Unlike PHP 4, array_merge
now only accepts parameters of type array. However, you can use typecasting
to merge other types. See the example below for details.
array_merge PHP 5 example
<?php
$beginning = 'foo';
$end = array(1 => 'bar');
$result = array_merge((array)$beginning, (array)$end);
print_r($result);
?>
The above example will output:
Array
(
[0] => foo
[1] => bar
) |
| cal_info | The calendar parameter becomes optional
and defaults to "all calendars" if omitted. |
| checkdnsrr | AAAA type was added. |
| class_exists | The autoload parameter was added. |
| com_release | This function was removed. |
| curl_setopt | Introduced CURLOPT_FTP_USE_EPRT,
CURLOPT_NOSIGNAL,
CURLOPT_UNRESTRICTED_AUTH,
CURLOPT_BUFFERSIZE,
CURLOPT_HTTPAUTH,
CURLOPT_PROXYPORT,
CURLOPT_PROXYTYPE,
CURLOPT_SSLCERTTYPE, and
CURLOPT_HTTP200ALIASES. |
| dirname | dirname is now binary safe |
| empty | Objects with no properties are no longer considered empty. |
| error_reporting | E_STRICT introduced (not part of E_ALL). |
| extension_loaded | extension_loaded uses the internal extension name
to test whether a certain extension is available or not. Most internal
extension names are written in lower case but there may be extensions
available which also use uppercase letters. Prior to PHP 5, this function
compared the names case sensitively. |
| fgetss | The length parameter is optional |
| file | Prior to PHP 5.0.0 the flags parameter only
covered include_path and was
enabled with 1 |
| file | The context parameter was added |
| file_get_contents | Added context support. |
| file_put_contents | Added context support |
| get_class | The object parameter is optional if called
from the object's method. |
| get_class | The class name is returned in its original notation. |
| get_class_methods | As of PHP 5, this function returns the name of the methods as they
were declared (case-sensitive). In PHP 4 they were lowercased. |
| get_defined_constants | The categorize parameter was added. |
| get_defined_vars | The $GLOBALS variable is included in the results of
the array returned. |
| get_parent_class | The object parameter is optional if called
from the object's method. |
| html_entity_decode | Support for multi-byte encodings was added. |
| ip2long | Prior to this version, ip2long returned -1 on
failure. |
| is_a | This function became deprecated in favour of the
instanceof
operator. Calling this function will result in an
E_STRICT warning. |
| is_executable | is_executable became available with
Windows |
| jdtojewish | The fl parameter was added. |
| mb_encode_mimeheader | The indent parameter was added. |
| mb_send_mail | The Content-Type and Content-Transfer-Encoding
headers may be redefined as of PHP 5.0.0. Before this time, the values defined by
mb_language are always used. |
| md5 | The raw_output parameter was added. |
| md5_file | Added the raw_output parameter |
| microtime | The get_as_float parameter was added. |
| mkdir | The recursive parameter was added |
| mkdir | As of PHP 5.0.0 mkdir can also be used with
some URL wrappers. Refer to for a listing of which wrappers support
mkdir |
| mysql_fetch_object | Added the ability to return as a different object. |
| opendir | path supports the ftp://
URL wrapper. |
| openssl_pkcs7_encrypt | The cipherid parameter was added. |
| openssl_sign | The signature_alg parameter was added. |
| parse_ini_file | Values enclosed in double quotes can contain new lines. |
| pg_fetch_object | class_name and params
were added. The old form with result_type
still exists for backwards compatibility. |
| proc_open | Added the cwd, env and
other_options parameters. |
| range | The optional step parameter was added. |
| realpath | Prior to this release, a blank or NULL path would
cause realpath to return the directory name of the script. |
| rename | rename can now also be used with
some URL wrappers. Refer to for a listing of which wrappers
support rename. |
| rmdir | As of PHP 5.0.0 rmdir can also be used with
some URL wrappers. Refer to for a listing of which wrappers support
rmdir. |
| session_id | The , (comma) and - (minus)
characters are allowed in the file session handler. |
| set_error_handler | The error_types parameter was introduced. |
| sha1 | The raw_output parameter was added. |
| sha1_file | Added the raw_output parameter |
| socket_create | The AF_INET6 constant was added. |
| str_ireplace | The count parameter was added. |
| str_replace | The count parameter was added. |
| stream_get_meta_data | The following entries were added in the returned array:
mode, seekable,
and uri. |
| strip_tags | strip_tags is now binary safe. |
| strrpos | The offset parameter was introduced. |
| strrpos | The needle may now be a string of more than one
character. |
| strtotime | Microseconds began to be allowed, but they are ignored. |
| uniqid | The prefix parameter was made optional. |
| unlink | As of PHP 5.0.0 unlink can also be used with
some URL wrappers. Refer to for a listing of which wrappers support
unlink. |
| usleep | This function now works on Windows systems. |
| mysqli_result::fetch_object | Added the ability to return as a different object. |