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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$lowercase = range('a', 'z');
// Create an array with uppercase letters
$uppercase = range('A', 'Z');
// Merge both arrays
$letters = array_merge($lowercase, $uppercase);
// Shuffle the array
shuffle($letters);
$letters = join('',$letters);
// Display the shuffled array
print_r($letters);