PHP strcasecmp() Function: Syntax, Parameters, Return Values, and Usage Examples

strcasecmp()

is a PHP string function that compares two strings without considering case.

Syntax of strcasecmp() function

strcasecmp(string $str1, string $str2): int

Parameter description:

$str1

: the first string to compare. $str2: the second string to compare.

Return value:

If $str1 and $str2 are identical, the function returns 0.

If $str1 is greater than $str2, it returns a value greater than 0.

If $str1 is less than $str2, it returns a value less than 0.

Usage of strcasecmp() function

<?php
$string1 = "Hello";
$string2 = "hello";
$result = strcasecmp($string1, $string2);
echo $result; // outputs 0 because characters are the same ignoring case

$string3 = "Hello";
$string4 = "HELLO";
$result = strcasecmp($string3, $string4);
echo $result; // outputs 0 because strings are identical

$string5 = "world";
$string6 = "World";
$result = strcasecmp($string5, $string6);
echo $result; // outputs a value less than 0 because $string5 is less than $string6
?>

Summary

Using strcasecmp() is advantageous because it ignores case differences, which is useful for comparing and sorting textual data, such as matching user input regardless of case.

PHP learning recommendations:

Vue3+Laravel8+Uniapp Beginner to Real‑World Development Tutorial

Vue3+TP6+API Social E‑commerce System Development Course

Swoole From Beginner to Master Recommended Course

Workerman+TP6 Real‑time Chat System Limited‑time Offer