is null php
// The is_null() function checks whether a variable is NULL or not. This function returns true (1) if the variable is NULL, otherwise it returns false/nothing.
<?php
$var = NULL;
if (is_null($var)) {
echo "yes, is null";
} else {
echo "not null";
}
?>check null in_array php
if (!empty($data_days) && in_array(1, $data_days, true)){ // use numeric value 1, not stringCopyright © 2021 Codeinu
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