How to determine whether an array is empty in php

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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