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PHP strcasecmp() Function

PHP String Reference PHP String Reference

Example

Compare two strings (case-insensitive):

<?php
echo strcasecmp("Hello world!","HELLO WORLD!");
?>

Run example »

Definition and Usage

The strcasecmp() function compares two strings.

Tip: The strcasecmp() function is binary-safe and case-insensitive.

Tip: This function is similar to the strncasecmp() function, with the difference that you can specify the number of characters from each string to be used in the comparison with strncasecmp().


Syntax

strcasecmp(string1,string2)

Parameter Description
string1 Required. Specifies the first string to compare
string2 Required. Specifies the second string to compare

Technical Details

Return Value: This function returns:
  • 0 - if the two strings are equal
  • <0 - if string1 is less than string2
  • >0 - if string1 is greater than string2
PHP Version: 4+


More Examples

Example 1

Compare two strings (case-insensitive = HELLO and hELLo will output the same):

<?php
echo strcasecmp("Hello","HELLO");
echo "<br>";
echo strcasecmp("Hello","hELLo");
?>

Run example »

Example 2

Different return values:

<?php
echo strcasecmp("Hello world!","HELLO WORLD!"); // The two strings are equal
echo strcasecmp("Hello world!","HELLO"); // String1 is greater than string2
echo strcasecmp("Hello world!","HELLO WORLD! HELLO!"); // String1 is less than string2
?>

Run example »


PHP String Reference PHP String Reference

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