/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

20 votes187 views4 answers
Laravel where is null
PHP
0 vote207 views1 answer
Lity in Wordpress
PHP Wordpress
6 votes179 views3 answers
Php remove last character from string if comma
PHP
0 vote195 views1 answer
Laravel bootstrap-auth setup
PHP Laravel
1 vote165 views2 answers
Php 7 count result in database
PHP
9 votes235 views4 answers
Datetime format laravel
PHP Laravel
0 vote179 views2 answers
Remove decimal php
PHP
0 vote192 views1 answer
Add custom attribute for validation errors laravel
PHP Laravel
2 votes166 views1 answer
Change php version in composer does not satisfy that requirement
PHP
0 vote156 views1 answer
Php split large text on line breaks into array
PHP