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PCRE Funkcje
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# preg_quote

(PHP 4, PHP 5)

preg_quote — Quote regular expression characters

### Opis

string preg_quote ( string `$str` [, string `$delimiter` = `NULL` ] )

preg_quote() takes `str` and puts a backslash in front of every character that is part of the regular expression syntax. This is useful if you have a run-time string that you need to match in some text and the string may contain special regex characters.

The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | : -

### Parametry

`str`

  The input string.

`delimiter`

  If the optional `delimiter` is specified, it will also be escaped. This is useful for escaping the delimiter that is required by the PCRE functions. The / is the most commonly used delimiter.

### Zwracane wartości

Returns the quoted string.

### Rejestr zmian

Wersja | Opis
--- | ---
5.3.0 | The - character is now quoted

### Przykłady

Przykład #1 preg_quote() example

`<?php
$keywords = '$40 for a g3/400';
$keywords = preg_quote($keywords, '/');
echo $keywords; // returns \$40 for a g3\/400
?>`

Przykład #2 Italicizing a word within some text

`<?php
// In this example, preg_quote($word) is used to keep the
// asterisks from having special meaning to the regular
// expression.
$textbody = "This book is *very* difficult to find.";
$word = "*very*";
$textbody = preg_replace ("/" . preg_quote($word) . "/",
"<i>" . $word . "</i>",
$textbody);
?>`

### Notatki

> Informacja: Ta funkcja jest bezpieczna dla danych binarnych.

preg_match
preg_replace_callback
PCRE Funkcje
PHP Manual