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PHP quotemeta() Function

Complete PHP String Reference

Definition and Usage

The quotemeta() function adds backslashes in front of some predefined characters in a string.

The predefined characters are:

period (.)
backslash (\)
plus sign (+)
asterisk (*)
question mark (?)
brackets ([])
caret (^)
dollar sign ($)
parenthesis (())

Syntax

quotemeta(string)

Parameter	Description
string	Required. Specifies the string to check

Tips and Notes

Tip: This function can be used to escape characters with special meanings, such as ( ), [ ], and * in SQL.

Example

<?php
$str = "Hello world. (can you hear me?)";
echo quotemeta($str);
?>

The output of the code above will be:

Hello world\. $can you hear me\?$