PHP additives() وظيفة

PHP String Functions

Example

Add backslashes before each double quote ("):

<?php
$str = addslashes('Shanghai is the "biggest" city in China.');
echo($str);
?>

Run Instances

Definition and Usage

The addslashes() function returns a string with backslashes added before predefined characters.

The predefined characters are:

  • Single Quotes ('}
  • Double Quotes ("}
  • Backslash (\)
  • NULL

Tip:This function can be used to prepare strings for storage in databases and for database query statements.

Note:By default, PHP automatically runs addslashes() on all GET, POST, and COOKIE data. Therefore, you should not use addslashes() on already escaped strings, as this will cause double escaping. In such cases, you can use the function get_magic_quotes_gpc() to check.

Syntax

addslashes(string)
Parameter Description
string Required. Specifies the string to be escaped.

Technical Details

Return Value: Return the escaped string.
PHP Version: 4+

More Examples

Example 1

Add backslashes to predefined characters in a string:

<?php
$str = "Who's Bill Gates?";
echo $str . " This is not safe in a database query.<br>";
echo addslashes($str) . " This is safe in a database query.";
?>

Run Instances

PHP String Functions