preg_quote
(PHP 3 >= 3.0.9, PHP 4, PHP 5)
preg_quote -- Quote regular expression characters
Descrição
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:
. \ + * ? [ ^ ] $ ( ) { } = ! < > | :
Parâmetros
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.
Valores de retornado
Returns the quoted string.
Exemplos
Exemplo 1. preg_quote() example
<?php $keywords = '$40 for a g3/400'; $keywords = preg_quote($keywords, '/'); echo $keywords; // returns \$40 for a g3\/400 ?>
|
|
Exemplo 2. Italicizing a word within some text
<?php // In this example, preg_quote($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); ?>
|
|
Notas
Nota: Esta função é
compatível com dados binários