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PHP strstr() Function

PHP strstr() function is used to search the first occurrence of a string inside another given string and displays some part of the latter starting from the first occurrence of the former in the latter. It is case-sensitive and binary-safe. The case-insensitive version of this function is stristr() function.

Syntax:

  strstr( $string, $search, $before );

Parameter Values

Parameter	Description
String	This is a required parameter. This parameter defines the string to search.
Search	This is a required parameter. This parameter defines the string to search for.
Before	This is an optional parameter. This parameter holds a boolean value which is by default "false". If it is "true", it returns the part of the string before the first occurrence of the search parameter.

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

<html>
<body>

<?php
echo strstr("A B C D A B C D","C");
?>

</body>
</html>

Output:
C D A B C D

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

<html>
<body>

<?php
echo strstr("A B C D E A B C D E.",67);
?>

</body>
</html>

Output:
C D E A B C D E.

Here is an another example of strstr() function in PHP with the TRUE value of $before parameter:

<html>
<body>

<?php
echo strstr("A B C D E A B C D E.","E",true);  //return string before the occurrence
?>
</body>
</html>

Output:
A B C D

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