How can special characters, such as Byte Order Marks, affect the sorting of arrays in PHP?

Special characters, such as Byte Order Marks (BOM), can affect the sorting of arrays in PHP by causing unexpected behavior due to the characters being included in the comparison process. To solve this issue, you can use the `preg_replace` function to remove any special characters, including BOM, from the array elements before sorting. 

$array = ["\xEF\xBB\xBFapple", "banana", "cherry"]; // Array with BOM in first element

// Remove special characters, including BOM, from array elements
$array = array_map(function($value){
    return preg_replace('/[\x00-\x1F\x80-\xFF]/', '', $value);
}, $array);

// Sort the array
sort($array);

print_r($array); // Output: Array ( [0] => apple [1] => banana [2] => cherry )

Keywords

special characters Byte Order Marks sorting arrays PHP

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