strcoll(): locale-based string comparison

Syntax

int strcoll ( string $string1 , string $string2 )

• Less than 0 if $string1 is less than $string2.
• Greater than 0 if $string1 is greater than $string2.
• 0 if $string1 is equal to $string2.

Basic Example of strcoll()

$str1 = "apple";
$str2 = "banana";
echo strcoll($str1, $str2); // Output will be less than 0 because "apple" is less than "banana"

-1

Example with Equal Strings

$str1 = "apple";
$str2 = "apple";
echo strcoll($str1, $str2); // Output will be 0 because both strings are the same

0

Locale-Aware Example

setlocale(LC_COLLATE, 'en_US');  // Set locale to US English
$str1 = "apple";
$str2 = "Apple";
echo strcoll($str1, $str2); // Output will be greater than 0 because "apple" > "Apple" in US locale

setlocale(LC_COLLATE, 'fr_FR');  // Set locale to French
echo strcoll($str1, $str2); // Output might change depending on French locale rules

1
1

Comparing Numeric Strings

$str1 = "123";
$str2 = "456";
echo strcoll($str1, $str2); // Output will be less than 0 because "123" is less than "456"

-1

Case-Sensitive Comparison

$str1 = "Hello";
$str2 = "hello";
echo strcoll($str1, $str2); // Output depends on the locale, but typically it's case-sensitive

-1

Conclusion