Forum und email
preg_quote
Manuál PHP
PředcházejícíDalší

preg_quote

(PHP 3 >= 3.0.9, PHP 4, PHP 5)

preg_quote -- Quote regular expression characters

Popis

string preg_quote ( string str [, string delimiter] )

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: . \ + * ? [ ^ ] $ ( ) { } = ! < > | :

Seznam parametrů

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.

Návratové hodnoty

Returns the quoted string.

Příklady

Příklad 1. preg_quote() example

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

Příklad 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);
?>

Poznámky

Poznámka: Tato funkce je binárně bezpečná.

PředcházejícíDomůDalší
preg_matchNahoru