/PHP/How to prevent the Undefined index in php

How to prevent the Undefined index in php

Php undefined index

// Your array index has no value or is not referencing anything,
// The easiest way to overcome this is to simply check whether
// it has been defined
if (isset($arr[$i])) {
	// Do something
}

Php undefined index meaNING

$_SESSION['yy'] = isset($_POST['yy']) ? $_POST['yy'] : "";     // This is on line 11
$_SESSION['mm'] = isset($_POST['mm']) ? $_POST['mm'] : "";     // This is on line 12
$_SESSION['dd'] = isset($_POST['dada']) ? $_POST['dada'] : ""; // This is on line 13

Source: stackoverflow.com

How to prevent the Undefined index in php

// Before using $_POST['value']    if (isset($_POST['value']))    {              // Instructions if $_POST['value'] exist    }

Source: ccm.net

Similar codes

3 votes199 views1 answer
Wordpress wp_head
PHP
0 vote201 views2 answers
How to print string plus variable in php
PHP
0 vote178 views1 answer
Get slogan wp
PHP
0 vote201 views2 answers
Laravel display category post by slug
PHP
0 vote254 views1 answer
Drupal 9 entity.repository load entity by UUID
PHP Drupal
18 votes208 views6 answers
Wherein laravel
PHP Laravel
2 votes204 views1 answer
Php count number of files in directory
PHP
0 vote189 views1 answer
Enumerations - PHP 8.1
PHP
3 votes199 views2 answers
Laravel 8 Target class [FormController] does not exist.
PHP
0 vote216 views2 answers
Laravel file upload
PHP