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@ 2019-01-23T00:12:58Z

<?php
    define("MAX",strlen("byebye"));

    const SENDOFF = "goodbye";
    const START = 4; // position of "b" in goodbye

    $temp  = SENDOFF;

    for ( $i = 0; $i < MAX; $i++ ){
        $pos = START + ( $i % 3);
        $temp[$i] = SENDOFF[$pos];
    }
    $temp{$i} = "\0";
    printf("%s\n",$temp); // byebye

Output
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define: documentation ( source)
printf: documentation ( source)

preferences:dark modelive preview

57.02 ms | 402 KiB | 5 Q