How to loop to find the number of array elements in php

Implementation method: 1. Define a counter variable with the syntax "$len=0;"; 2. Loop through the array with the syntax "foreach($arr as $v){}"; 3. In the loop body , use the "$len;" statement to count the number, and each time the loop loops, the counter value increases by 1; 4. When the loop ends, just output the counter value.

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

php loops to find an array Number of elements

In PHP, when it comes to looping arrays, the for and foreach statements come to mind.

But when the for statement loops through an array, it needs to know the length of the array, so this article does not apply.

So we need to use the foreach statement to loop the array.

Implementation idea:

• #Define a counter variable $len, with the value initialized to 0, used to count the number of array elements.

• Use the foreach statement to loop through the array

• In the loop body, use the " " operator to calculate the number, once each loop, let The counter value is increased by 1

• . The cycle ends and the counter value is output.
  

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(1,2,3,4,5,32,34,12,0,7);
var_dump($arr);
$len=0;
foreach($arr as $v){
	$len++;
}
echo "数组元素个数为：".$len;
?>

Is it correct? Let’s use the built-in function to verify:

echo "数组元素个数为：".count($arr);

ok, it’s correct.

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