What is the importance of properly debugging PHP functions like rstrtrim to ensure they work as intended?

Properly debugging PHP functions like rstrtrim is important to ensure they work as intended because it helps identify and fix any errors or unexpected behavior in the code. This can prevent potential issues in the application and improve its overall reliability and performance. 

function rstrtrim($str, $charlist) {
    $charlist = preg_quote($charlist, '/');
    return preg_replace('/['.$charlist.']+$/', '', $str);
}

Keywords

PHP debugging rstrtrim functions error detection

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