Usage of strcmp function in php

strcmp function usage in php

strcmp definition and usage

## The #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.

Example 1

Compare two strings (case sensitive, Hello and hELLo output are different):

<?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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