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If you want to determine whether an array is empty in php, you can use the empty() function or the count() function.
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1. Use the "empty()" function to judge and pass the array into this function. If it is true, it means it is empty;
$arr = []; if (empty($arr)) { //为空 } else { //不为空 }
2. Through "count()" function to get the number of array items, and then determine whether it is less than 1 based on the number of items. If it is less than 1, it means it is empty;
$arr = []; if (count($arr) < 1) { //为空 } else { //不为空 }
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