Php undefined offset

Php check undefined offset

// $key = 10, if $array does not have $array[10] set, it will return false
// If $array[10] has any value, it will return true
if(array_key_exists($key, $array)){}

Php undefined offset

If preg_match did not find a match, $matches is an empty array. So you should check if preg_match found an match before accessing $matches[0], for example:

function get_match($regex,$content)
{
    if (preg_match($regex,$content,$matches)) {
        return $matches[0];
    } else {
        return null;
    }
}

Source: stackoverflow.com

Similar codes

12 votes315 views2 answers
Valide email php
PHP
0 vote458 views1 answer
Yii2 OAuth2
PHP Yii
2 votes313 views1 answer
Wp get term link
PHP
2 votes341 views1 answer
Webhook discord php
PHP
12 votes330 views6 answers
Remove null values from array php
PHP
27 votes326 views10 answers
Google translate
PHP
4 votes355 views3 answers
Array search multidimensional php
PHP
0 vote393 views4 answers
Installing bootstrap ui in laravel app
PHP Laravel
0 vote327 views5 answers
Wordpress png img src= image.png
PHP
0 vote324 views1 answer
PHP | Send Attachment With Email
PHP