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How do You Compare Two Strings in PHP With Example?

Hello Friends Today, through this tutorial, I will tell you How do you compare two strings using PHP, PHP 8, PHP 8.1, PHP 8.2, PHP 8.3 With Example? In PHP, you can compare two strings using comparison operators like `==`, `===`, `<`, `>`, `<=`, and `>=`. These operators allow you to determine whether one string comes before, after, or is the same as another string based on their alphabetical order. Here’s how you can compare two strings:

1. Using `==` for loose comparison:

<?php
$string1 = "apple";
$string2 = "banana";
if ($string1 == $string2) {
echo "The strings are equal.";
} elseif ($string1 < $string2) {
echo "$string1 comes before $string2.";
} else {
echo "$string1 comes after $string2.";
}
?>

2. Using `===` for strict comparison (checks both value and data type):

<?php
$string1 = "apple";
$string2 = "banana";
if ($string1 === $string2) {
echo "The strings are equal.";
} elseif ($string1 < $string2) {
echo "$string1 comes before $string2.";
} else {
echo "$string1 comes after $string2.";
}
?>

3. Using other comparison operators such as `<`, `>`, `<=`, and `>=`:

<?php
$string1 = "apple";
$string2 = "banana";
if ($string1 < $string2) {
echo "$string1 comes before $string2.";
} elseif ($string1 > $string2) {
echo "$string1 comes after $string2.";
} else {
echo "The strings are equal.";
}
?>

These comparisons will output:

apple comes before banana.

In PHP, string comparison is based on the ASCII value of characters, so it is case-sensitive. To perform a case-insensitive comparison, you can use functions like `strcasecmp()` or `strtolower()` or `strtoupper()` to normalize the strings before comparison.