A collection of static methods to play with strings. More...

Static Public Member Functions
static	delimiterReplace ($startDelim, $endDelim, $replace, $subject, $flags= '')
	Perform an operation equivalent to.
static	delimiterReplaceCallback ($startDelim, $endDelim, $callback, $subject, $flags= '')
	Perform an operation equivalent to.
static	escapeRegexReplacement ($string)
	Escape a string to make it suitable for inclusion in a preg_replace() replacement parameter.
static	explode ($separator, $subject)
	Workalike for explode() with limited memory usage.
static	explodeMarkup ($separator, $text)
	More or less "markup-safe" explode() Ignores any instances of the separator inside <...>
static	hungryDelimiterReplace ($startDelim, $endDelim, $replace, $subject)
	Perform an operation equivalent to.
static	isUtf8 ($value, $disableMbstring=false)
	Test whether a string is valid UTF-8.

Detailed Description

A collection of static methods to play with strings.

Definition at line 26 of file StringUtils.php.

Member Function Documentation

static StringUtils::delimiterReplace	(	$	startDelim,
		$	endDelim,
		$	replace,
		$	subject,
		$	flags = `''`
	)		`[static]`

Perform an operation equivalent to.

preg_replace( "!$startDelim(.*)$endDelim!$flags", $replace, $subject )

Parameters:

string	$startDelim	Start delimiter regular expression
string	$endDelim	End delimiter regular expression
string	$replace	Replacement string. May contain $1, which will be replaced by the text between the delimiters
string	$subject	String to search
string	$flags	Regular expression flags

Returns:: string The string with the matches replaced

Definition at line 256 of file StringUtils.php.

References $flags, and delimiterReplaceCallback().

Referenced by Sanitizer\normalizeCss(), CoreTagHooks\pre(), and Sanitizer\stripAllTags().

static StringUtils::delimiterReplaceCallback	(	$	startDelim,
		$	endDelim,
		$	callback,
		$	subject,
		$	flags = `''`
	)		`[static]`

Perform an operation equivalent to.

preg_replace_callback( "!$startDelim(.*)$endDelim!s$flags", $callback, $subject )

This implementation is slower than hungryDelimiterReplace but uses far less memory. The delimiters are literal strings, not regular expressions.

If the start delimiter ends with an initial substring of the end delimiter, e.g. in the case of C-style comments, the behavior differs from the model regex. In this implementation, the end must share no characters with the start, so e.g. /*\/ is not considered to be both the start and end of a comment. /*\/xy/*\/ is considered to be a single comment with contents /xy/.

Parameters:

string	$startDelim	Start delimiter
string	$endDelim	End delimiter
callable	$callback	Function to call on each match
string	$subject
string	$flags	Regular expression flags

Exceptions:

MWException

Returns:: string

Definition at line 168 of file StringUtils.php.

References $flags, $output, and array().

Referenced by delimiterReplace(), and explodeMarkup().

static StringUtils::escapeRegexReplacement ( $ string ) [static]

Escape a string to make it suitable for inclusion in a preg_replace() replacement parameter.

Parameters:

string $string

Returns:: string

Definition at line 296 of file StringUtils.php.

Referenced by Linker\formatLinksInComment(), and SyncFileBackend\replaceNamePaths().

static StringUtils::explode	(	$	separator,
		$	subject
	)		`[static]`

Workalike for explode() with limited memory usage.

Returns an Iterator

Parameters:

string	$separator
string	$subject

Returns:: ArrayIterator|ExplodeIterator

Definition at line 310 of file StringUtils.php.

Referenced by CLDRPluralRuleEvaluator\evaluateCompiled(), explodeMarkup(), GenerateCollationData\generateFirstChars(), hungryDelimiterReplace(), and ConverterRule\parseFlags().

static StringUtils::explodeMarkup	(	$	separator,
		$	text
	)		`[static]`

More or less "markup-safe" explode() Ignores any instances of the separator inside <...>

Parameters:

string	$separator
string	$text

Returns:: array

Definition at line 270 of file StringUtils.php.

References as, delimiterReplaceCallback(), and explode().

static StringUtils::hungryDelimiterReplace	(	$	startDelim,
		$	endDelim,
		$	replace,
		$	subject
	)		`[static]`

Perform an operation equivalent to.

preg_replace( "!$startDelim(.*?)$endDelim!", $replace, $subject );

except that it's worst-case O(N) instead of O(N^2)

Compared to delimiterReplace(), this implementation is fast but memory- hungry and inflexible. The memory requirements are such that I don't recommend using it on anything but guaranteed small chunks of text.

Parameters:

string	$startDelim
string	$endDelim
string	$replace
string	$subject

Returns:: string

Definition at line 131 of file StringUtils.php.

References $output, $s, as, and explode().

static StringUtils::isUtf8	(	$	value,
		$	disableMbstring = `false`
	)		`[static]`

Test whether a string is valid UTF-8.

The function check for invalid byte sequences, overlong encoding but not for different normalisations.

This relies internally on the mbstring function mb_check_encoding() hardcoded to check against UTF-8. Whenever the function is not available we fallback to a pure PHP implementation. Setting $disableMbstring to true will skip the use of mb_check_encoding, this is mostly intended for unit testing our internal implementation.

Since:: 1.21

Note:: In MediaWiki 1.21, this function did not provide proper UTF-8 validation. In particular, the pure PHP code path did not in fact check for overlong forms. Beware of this when backporting code to that version of MediaWiki.

Parameters:

string	$value	String to check
bool	$disableMbstring	Whether to use the pure PHP implementation instead of trying mb_check_encoding. Intended for unit testing. Default: false

Returns:: bool Whether the given $value is a valid UTF-8 encoded string

Definition at line 51 of file StringUtils.php.

References $value, array(), and as.

Referenced by StringUtilsTest\testIsUtf8WithMbstring(), and StringUtilsTest\testIsUtf8WithPhpFallbackImplementation().

The documentation for this class was generated from the following file:

includes/utils/StringUtils.php

Static Public Member Functions

Detailed Description

Member Function Documentation