string compare in php

//In php to compare two string we can use strcmp() function
Syntax
strcmp(string1,string2);

//If both string is same then it will return 0
<?php
echo strcmp("Hello world!","Hello world!");
?>

<?php
$var1 = "Hello";
$var2 = "hello";
if (strcmp($var1, $var2) !== 0) {
    echo '$var1 is not equal to $var2 in a case sensitive string comparison';
}
?>

<?php 
  
// Declaration of strings 
$name1 = "Geeks"; 
$name2 = "geeks"; 
  
// Use strcmp() function  
if (strcmp($name1, $name2) !== 0) { 
    echo 'Both strings are not equal'; 
} 
else { 
    echo 'Both strings are equal'; 
} 
?> 

<?php 
  
// Declaration of strings 
$name1 = "Geeks"; 
$name2 = "Geeks"; 
  
// Use == operator 
if ($name1 == $name2) { 
    echo 'Both strings are equal'; 
} 
else { 
    echo 'Both strings are not equal'; 
} 
?>