PHP strcmp() function
The PHP strcmp() string function used to compare two strings. If both string are same then returns zero(0), if does not same returns any other digit value except zero(0) depend on length of both string.
The PHP strcmp() function syntax
strcmp(“string1”, “string2”);
Here, we have two strings string1 and string2 if both are same then return zero(0).
The strcmp() function works like :
returns 0 if both strings are equal
returns >0 if string1 is greater than string2
returns <0 if string2 is greater than string1
PHP strcmp() string function example
<?php
echo "The sting compare =". strcmp("Meera", "Meera");
?>The out put is:
The string compare = 0, as both strings are equal.
<?php
echo "The sting compare = ". strcmp("Meera","meera");
?>The string compare = -1 , here both string are same but there is a different in letter case so the result is -1.
<?php
echo "The sting compare = ". strcmp("meera academy","meera");
?>The string compare = 8, because the string1 is greater than string2.
strcmp() function php form example
Now lets take an example of php form for understand strcmp() string function. create a php web form with two textboxes for input two values and a submit button control for compare entered two strings are same or not using strcmp() function.
<html>
<head>
<title>PHP strcmp() Function</title>
</head>
<body>
<FORM method="POST" action="firstexample.php">
String1 : <input type="text" name="str1"> <br/>
String2 : <input type="text" name="str2"> <br/>
<br/>
<input type="submit" name="Submit1" value="compare string()">
</FORM>
<?php
if(isset($_POST['Submit1']))
{
if(strcmp($_POST["str1"],$_POST["str2"]))
{
echo "strings are not same";
}
else
{
echo "strings are same";
}
}
?>
</body>
</html>The output of above php strcmp() function is:
