What does strcmp in PHP mean?

What does strcmp in PHP mean?

Definition and usage

strcmp() function compares two strings.

Note: The strcmp() function is binary safe and case-sensitive.

Tip: This function is similar to the strncmp() function, except that with strncmp() you can specify the number of characters for each string to be compared.

Syntax

strcmp(string1,string2)

Parameters

string1 Required. Specifies the first string to compare.

string2 Required. Specifies the second string to be compared.

Return value:

This function returns:

0 - if the two strings are equal

a8bacc06128749489fc86bda2552a2bc0 - if string1 is greater than string2

Example 1

Compare two strings (case sensitive, Hello and hELLo output are not the same):

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

Output:

0
-1

Example 2

Different return values:

<?php
echo strcmp("Hello world!","Hello world!"); // 两字符串相等
echo strcmp("Hello world!","Hello"); // string1 大于 string2
echo strcmp("Hello world!","Hello world! Hello!"); // string1 小于 string2
?>

Output:

0
7
-7

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