3v4l.org

run code in 300+ PHP versions simultaneously

@ 2018-10-03T21:01:04Z

<?php

    $chars = [
        'a' => 'c',
        'b' => 'd',
        'c' => 'a',
        'd' => 'e',
        'e' => 'b',
    ];

    $original  = 'acdcxx';
    
    // Encrypt
    $encrypted = '';

    for ($i = 0; $i < strlen($original); $i++) {
        // If we find the character in our mapping array, use the mapped character.
        // If not, let's use the original character.
        $encrypted .= array_key_exists($original[$i], $chars) 
            ? $chars[$original[$i]]
            : $original[$i];
    }
    
    print_r($encrypted);

    // Decrypt
    $decrypted = '';
    for ($i = 0; $i < strlen($encrypted); $i++) {
        // Find the correct key
        $key = array_search($encrypted[$i], $chars);

        // If the character existed, use the key.
        // If not, use the original character.
        $decrypted .= $key !== false 
            ? $key
            : $encrypted[$i];
    }
    
    echo PHP_EOL;    
    print_r($decrypted);

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: caeaxx acdcxx
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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