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

6 votes174 views2 answers
Default time zone india php
PHP
18 votes196 views5 answers
If else statement in laravel blade
PHP Laravel
1 vote272 views3 answers
Queue jobs in laravel
PHP Laravel
0 vote171 views1 answer
Root composer.json requires PHP extension ext-gmp * but it is missing from your system. Install or enable PHP's gmp extension.
PHP
0 vote161 views1 answer
Store as real file name laravel uplaod
PHP
0 vote165 views1 answer
Yii app db createcommand join yii1
PHP
0 vote182 views1 answer
Get lat long from google maps php
PHP
0 vote185 views1 answer
Add auth middleware to route laravel
PHP Laravel
0 vote200 views1 answer
Wordpress wp_query orderby random
PHP Wordpress
1 vote225 views3 answers
Laravel JSON query
PHP Laravel