strcmp() : Case sensitive string comparison

echo strcmp("Hello world","HELLO WORLD"); // Output is 1 

• 0 : if both strings are equal or matching
• < 0 : if string 1 is less than string 2
• > 0 : if string 1 is greater than string 1

$str1="Hello World";
$str2="hello world";
echo strcmp($str1,$str2); // Output is -1 
echo "<br>";
if(strcmp($str1,$str2)==0){
echo "Both strings are matching";
}else{
echo "Both strings are different ";
}

-1
Both strings are different

$str1="Hello World";
$str2="Hello World";
echo strcmp($str1,$str2); // Output is 0 
echo "<br>";
if(strcmp($str1,$str2)==0){
echo "Both strings are matching";
}else{
echo "Both strings are different ";
}

0
Both strings are matching

Example: Case-Insensitive String Comparison

$result = strcasecmp('Hello', 'hello');
if ($result === 0) {
    echo 'The strings are equal (case-insensitive).';
} else {
    echo 'The strings are not equal.';
}

The strings are equal (case-insensitive).

Example: Comparing Strings with Different Encodings

$str1 = mb_convert_encoding('Straße', 'UTF-8', 'ISO-8859-1');
$str2 = 'Strasse';
if (strcmp($str1, $str2) === 0) {
    echo "The strings are equal.";
} else {
    echo "The strings are not equal.";
}

The strings are not equal.

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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