String Functions
PHP Manual

strcasecmp

Binary safe case-insensitive string comparison

Description

int strcasecmp(string $string1, string $string2)

Binary safe case-insensitive string comparison. The comparison is not locale aware; only ASCII letters are compared in a case-insensitive way.

Parameters

string1

The first string

string2

The second string

Return Values

Returns -1 if string1 is less than string2; 1 if string1 is greater than string2, and 0 if they are equal.

Changelog

Version Description
8.2.0 This function now returns -1 or 1, where it previously returned a negative or positive number.

Examples

Example #1 strcasecmp example

<?php
$var1 = "Hello";
$var2 = "hello";
if (strcasecmp($var1, $var2) == 0) {
    echo '$var1 is equal to $var2 in a case-insensitive string comparison';
}
?>

See Also

  • strcmp
  • preg_match
  • substr_compare
  • strncasecmp
  • stristr
  • substr