str_replace with array

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Because str_replace() replaces left to right, it might replace a previously inserted value when doing multiple replacements. 

    // Outputs F because A is replaced with B, then B is replaced with C, and so on...
    // Finally E is replaced with F, because of left to right replacements.
    $search  = array('A', 'B', 'C', 'D', 'E');
    $replace = array('B', 'C', 'D', 'E', 'F');
    $subject="A";
    echo str_replace($search, $replace, $subject);

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