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

1 vote141 views1 answer
Laravel validate enum field
PHP
0 vote140 views1 answer
Loop Illuminate\Support\Collection Object ( [items:protected] =
PHP
66 votes158 views5 answers
How do I convert a string to a number in PHP?
PHP
0 vote136 views1 answer
Payment gateway webhook returning 302 laravel
PHP
0 vote149 views1 answer
How to get private images in s3 laravel
PHP Laravel
0 vote133 views1 answer
Display date time twig
PHP
6 votes132 views5 answers
Php new object
PHP
0 vote135 views2 answers
Set posts_per_page
PHP
1 vote145 views1 answer
Php usort keep keys
PHP
0 vote126 views1 answer
Illuminate\Auth\EloquentUserProvider::validateCredentials()
PHP