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How to check whether a string variable is empty or null in PHP?

php check for empty string

if (empty($var)) {
    echo '$var is either 0, empty, or not set at all';

php check if string is empty

function strictEmpty($var) {

    // Delete this line if you want space(s) to count as not empty
    $var = trim($var);
    if(isset($var) === true && $var === '') {
        // It's empty
    else {
        // It's not empty



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