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PHP quotemeta() Function

PHP quotemeta() Function

PHP quotemeta() function is used to add a backslash before some predefined meta characters in the string. This function accepts a string as an argument and returns the string by adding the backslash before every predefined meta characters. By using this function we can avoids SQL injections attacks to our database. This function is also binary safe, which means it can be executed on a binary file without making any changes in it.

Some of the predefined meta characters are:

  • ( . ) -> period
  • ( + ) -> plus
  • ( * ) -> asterisk
  • ( $ ) -> dollar
  • ( ? ) -> question mark
  • ( [] ) -> brackets
  • ( () ) -> parenthesis

 

Syntax:

  quotemeta($string);

Parameter Values

Parameter Description
string This ia the required parameter. This parameter contains the input string to be checked.

Here is an example of quotemeta() function in PHP:

<html>
<body>

<?php
echo quotemeta("Hey Everyone...");
?> 
 
</body>
</html>
Output:
Hey Everyone\.\.\.

Here is an another example of quotemeta() function in PHP:

<html>
<body>

<?php
$str1 = "You + Me";
$str2 = "**PHP**";
$str3 = "PHP or Python??";
$str4 = "Can you give me $100";
$str5 = "Only Jerry(Admin) can login to this site.";

echo quotemeta($str1)."<br>";
echo quotemeta($str2)."<br>";
echo quotemeta($str3)."<br>";
echo quotemeta($str4)."<br>";
echo quotemeta($str5)."<br>";
?>
 
</body>
</html>
Output:
You \+ Me
\*\*PHP\*\*
PHP or Python\?\?
Can you give me \$100
Only Jerry\(Admin\) can login to this site\.

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