How to check how many values ​​there are in a php array

There are 5 values ​​in the php array. Query method: 1. Create a PHP sample file; 2. Create a counter variable and set the value to 0; 3. Use the syntax "foreach($arr as $v)" to loop Traverse the array; 4. Use the syntax "if(is_numeric($v)){$n;}" to determine whether the array element is a numeric value. If so, the counter will increase by 1; 4. The loop ends and the counter is output.

The operating environment of this tutorial: Windows 10 system, php8.1.3 version, dell g3 computer

How many values ​​does the php array have? Check

php to check how many values ​​an array contains and calculate the number of numerical elements in the statistical array.

Implementation method:

Create and initialize a counter variable with the value set to 0 for counting.

Use foreach loop to traverse the array

In the loop body, use the is_numeric function to determine whether the array element is a numeric value; if it is a numeric value, the counter will increase by 1.

The loop ends and the counter is output.

Implementation code:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr= array(1,"a",3,"b",5,"cc",7,"d",null,10);
var_dump($arr);
$n=0;
foreach($arr as $v){
	if(is_numeric($v)){
		$n++;
	}
}
echo "数值元素有： ".$n." 个";
?>

It can be seen that there are 5 numerical elements in the array.

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