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

Static Public Member Functions
static	delimiterExplode ( $startDelim, $endDelim, $separator, $subject, $nested=false)
	Explode a string, but ignore any instances of the separator inside the given start and end delimiters, which may optionally nest.

static	delimiterReplace ( $startDelim, $endDelim, $replace, $subject, $flags='')
	Perform an operation equivalent to `preg_replace()` with flags.

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	hungryDelimiterReplace ( $startDelim, $endDelim, $replace, $subject)
	Perform an operation equivalent to `preg_replace()`

static	isUtf8 ( $value)
	Test whether a string is valid UTF-8.

static	isValidPCRERegex ( $string)
	Utility function to check if the given string is a valid PCRE regex.

static	replaceMarkup ( $search, $replace, $text)
	More or less "markup-safe" str_replace() Ignores any instances of the separator inside `<...>`

Static Private Member Functions
static	delimiterReplaceCallback ( $startDelim, $endDelim, $callback, $subject, $flags='')
	Perform an operation equivalent to `preg_replace_callback()`

Detailed Description

A collection of static methods to play with strings.

Definition at line 29 of file StringUtils.php.

Member Function Documentation

◆ delimiterExplode()

static StringUtils::delimiterExplode	(	$startDelim,
		$endDelim,
		$separator,
		$subject,
		$nested = `false`
	)

static

Explode a string, but ignore any instances of the separator inside the given start and end delimiters, which may optionally nest.

The delimiters are literal strings, not regular expressions.

Parameters

string	$startDelim	Start delimiter
string	$endDelim	End delimiter
string	$separator	Separator string for the explode.
string	$subject	Subject string to explode.
bool	$nested	True iff the delimiters are allowed to nest.

Returns: ArrayIterator

Definition at line 59 of file StringUtils.php.

Referenced by Parser\makeImage(), and Parser\renderImageGallery().

◆ delimiterReplace()

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

static

Perform an operation equivalent to preg_replace() with flags.

Matches this code:

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 248 of file StringUtils.php.

References $matches, and delimiterReplaceCallback().

Referenced by Sanitizer\normalizeCss(), and Parser\stripSectionName().

◆ delimiterReplaceCallback()

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

staticprivate

Perform an operation equivalent to preg_replace_callback()

Matches this code:

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

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/.

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

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

InvalidArgumentException

Returns: string

Definition at line 157 of file StringUtils.php.

Referenced by delimiterReplace(), and replaceMarkup().

◆ escapeRegexReplacement()

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 314 of file StringUtils.php.

Referenced by MovePageForm\doSubmit(), Linker\formatLinksInComment(), MovePage\moveSubpagesInternal(), MagicWord\replace(), SyncFileBackend\replaceNamePaths(), FileBackendMultiWrite\substPaths(), and FileBackendMultiWrite\unsubstPaths().

◆ explode()

static StringUtils::explode	(	$separator,
		$subject
	)

static

Workalike for explode() with limited memory usage.

Parameters

string	$separator
string	$subject

Returns: ArrayIterator|ExplodeIterator

Definition at line 326 of file StringUtils.php.

References explode().

Referenced by LanguageConverter\autoConvert(), BlockLevelPass\execute(), explode(), GenerateCollationData\generateFirstChars(), Parser\handleAllQuotes(), Parser\handleInternalLinks2(), Parser\handleTables(), hungryDelimiterReplace(), LanguageConverter\parseCachedTable(), ConverterRule\parseFlags(), and Parser\renderImageGallery().

◆ hungryDelimiterReplace()

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

static

Perform an operation equivalent to preg_replace()

Matches this code:

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 118 of file StringUtils.php.

References $s, and explode().

◆ isUtf8()

static StringUtils::isUtf8 ( $value )

static

Test whether a string is valid UTF-8.

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

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.

Since: 1.21

Parameters

string $value String to check

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

Definition at line 44 of file StringUtils.php.

Referenced by Language\checkTitleEncoding(), and LinkFilter\indexifyHost().

◆ isValidPCRERegex()

static StringUtils::isValidPCRERegex ( $string )

static

Utility function to check if the given string is a valid PCRE regex.

Avoids manually calling suppressWarnings and restoreWarnings, and provides a one-line solution without the need to use .

Since: 1.34

Parameters

string $string The string you want to check being a valid regex

Returns: bool

Definition at line 299 of file StringUtils.php.

◆ replaceMarkup()

static StringUtils::replaceMarkup	(	$search,
		$replace,
		$text
	)

static

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

Parameters

string	$search
string	$replace
string	$text

Returns: string

Definition at line 268 of file StringUtils.php.

References $matches, and delimiterReplaceCallback().

Referenced by Parser\handleTables().

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

includes/libs/StringUtils.php

Static Public Member Functions

Static Private Member Functions

Detailed Description

Member Function Documentation

◆ delimiterExplode()

◆ delimiterReplace()

◆ delimiterReplaceCallback()

◆ escapeRegexReplacement()

◆ explode()

◆ hungryDelimiterReplace()

◆ isUtf8()

◆ isValidPCRERegex()

◆ replaceMarkup()