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

2 votes107 views1 answer
Php simple router script
PHP
32 votes123 views5 answers
How to make db seeder in laravel
PHP
4 votes109 views5 answers
Php run command line
PHP
1 vote122 views1 answer
Php bbcode tag dellete
PHP
11 votes119 views5 answers
Laravel redirect back url with message
PHP
0 vote104 views2 answers
Separate date from datetime php
PHP
0 vote144 views1 answer
Upload image to database laravel 8
PHP Laravel
8 votes198 views1 answer
How to migrate single table in laravel
PHP Laravel
0 vote107 views1 answer
Laravel custom abort message
PHP
0 vote77 views1 answer
How to get parameter value from request symfony
PHP