Current File : //home/forge/api-takeaseat.eco-n-tech.co.uk/app/Helpers/UniqueStringHelper.php
<?php
namespace App\Helpers;
use DB;
use Illuminate\Support\Str;
class UniqueStringHelper
{
/**
* Create a unique random string
*
* @param string $table
* @param string $col
* @param int $chars
*/
public static function createKey($table, $col, $chars = 16)
{
$unique = false;
// Store tested results in array to not test them again
$tested = [];
do{
// Generate random string of characters
$random = Str::random($chars);
// Check if it's already testing
// If so, don't query the database again
if( in_array($random, $tested) ){
continue;
}
// Check if it is unique in the database
$count = DB::table($table)->where($col, '=', $random)->count();
// Store the random character in the tested array
// To keep track which ones are already tested
$tested[] = $random;
// String appears to be unique
if( $count == 0){
// Set unique to true to break the loop
$unique = true;
}
// If unique is still false at this point
// it will just repeat all the steps until
// it has generated a random string of characters
}
while(!$unique);
return $random;
}
}
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