What is the Difference between strstr and stristr in php?

Answer 1

Both are used to find the first occurrence of the string but stristr( ) is case insensitive.

Syntax
$output = strstr ($string1, $string2)
$output = stristr ($string1, $string2)

where string2 would be searched in the string1 and returns the part of string1 starting from and including the first occurrence of string2 to the end of string1.

Example

<?php
$email = 'salil@queryhomE.com';
$target_str = strstr($email, 'E');
echo $target_str;
$target_str = stristr($email, 'E');
echo $target_str
?>

Output

E.com
eryHome.com

Answer 2

strstr() and stristr both are used to find the first occurence of the string but stristr( ) is case insensitive.

strstr() - Find first occurrence of a string
Syntax:
strstr ($string, string)

Example:

<?php
$email = 'rajesh@tEst.com';
$domain_name = strstr($email, 'E');
echo $domain_name;

?>

Output:Est.com

stristr() - Find first occurrence of a string (Case-insensitive)
Syntax:
stristr ($string, string)

Example:
<?php
$email = 'rajesh@tEst.com';
$domain_name = stristr($email, 'E');
echo $domain_name;

?>
Output: esh@tEst.com