How to delete elements with even keys in an array in php

Deletion method: 1. Use the "foreach($arr as $key=>$value" statement to loop through the array; 2. In the loop body, use the "$key%2==0" statement to determine Whether the key is an even number; 3. If it is an even number, use the "unset($arr[$key])" statement to delete the element.

This Tutorial operating environment: Windows 7 system, PHP version 7.1, DELL G3 computer

php deletes elements with even keys in the array

Implementation method:

• Use the foreach statement to loop through the array
  

foreach ($array as $key => $value){
    语句块;
}

Traverse the given $array array, and assign the value of the current array to $value, the key name is assigned to $key.

• In the loop body, use the $key%2==0 statement to determine whether the key is an even number

• If it is an even number, use the unset() function to delete

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$array = array("php", 11, &#39;&#39;, 12, "PHP中文网",13,"green",2021,"mysql","14",15); 
var_dump($array);
$result=[];
foreach ($array as $key => $value){
	if($key %2==0){
	unset($array[$key]);
	}
}
var_dump($array);
?>

Recommendation: "PHP Video Tutorial"

The above is the detailed content of How to delete elements with even keys in an array in php. For more information, please follow other related articles on the PHP Chinese website!