How to determine whether an array is empty in php

PHP’s preferred method to determine if an array is empty: count($arr),size($arr); (Recommended learning: PHP video tutorial）

Just use this function count. If the output is 0, then the array is empty. The following is a simple test code.

$arr= array("");
echo count($arr);
echo size($arr);
 
//输出1
 
$arr= array();
echo count($arr);
echo size($arr);
 
//输出0

PHP method to determine if an array is empty: empty($arr);

empty() The function is to determine whether the variable is empty. If the variable = empty, it returns TRUE , if it is not empty, return FALSE (not an empty value)

$arr= array("");
$result = empty($arr);
 
//$result = false
$arr = array();
$result = empty($arr);
 
//$result = true

Are these two methods sufficient to deal with the problem of judging whether simple arrays and multi-dimensional arrays are empty? Personally, I generally use empty() to judge whether the array is empty. , so that the code looks easier to understand.

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