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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$str = 'abcdefghigklmnoprstuvwxyz';
$arr = str_split($str);
$sub_arr = array_rand($arr, 8);
$res = [];
foreach($sub_arr as $key){
$res[] = $arr[$key];
}
shuffle($res);
print_r($res);