How can one sort an array case-insensitively using ksort/krsort in PHP?

When using ksort or krsort in PHP to sort an array, it defaults to a case-sensitive sorting method. To sort an array case-insensitively, you can use a custom sorting function with the strcasecmp function to compare keys in a case-insensitive manner. This allows you to sort the array while ignoring the case of the keys. 

// Custom sorting function for case-insensitive sorting
function caseInsensitiveSort($a, $b) {
    return strcasecmp($a, $b);
}

// Sample array to be sorted
$array = array("Apple" => 1, "banana" => 2, "Cherry" => 3);

// Sort the array keys case-insensitively
uksort($array, 'caseInsensitiveSort');

// Output the sorted array
print_r($array);

Keywords

php array sorting ksort krsort case-insensitive

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