How to find the sum of numbers in an array in php

Implementation steps: 1. Define a variable assigned a value of 0 to store the summation result, the syntax "$sum=0;"; 2. Use the foreach statement to loop through the array, the syntax "foreach($array as $ value){loop body statement block}"; 3. In the loop body, use is_numeric() to detect whether the array elements are numbers (or numeric strings), add the numeric elements and sum them, the syntax "if(is_numeric($value )){$sum =$value;}".

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

php seeks the array Method of summing numbers

#Step 1: Define a variable assigned a value of 0 to store the summation result.

$sum=0;

Step 2: Use the foreach statement to loop through the array

foreach ($array as $value){
    循环语句块
}

Traverse the given $array array, and change the value of the current array in each loop Assign to $value.

Step 3: In the loop body, use is_numeric() to detect whether the array element is a number (or numeric string), and add the numeric elements to the sum

if(is_numeric($value)){
$sum+=$value;
}

After the loop ends, the value of $sum is the summation result.

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$array = array("php",1,2,&#39;3&#39;,4,"hello","5",null,true,"6",7,8,"9","a"); 
var_dump($array);
$sum=0;
foreach($array as $value){
	if(is_numeric($value)){
		$sum+=$value;
	}
}
echo "数组中数字的总和：".$sum;
?>

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