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@ 2015-05-02T22:53:14Z

<?php

$i='4N4P9N7P1N1P2N2P';
preg_match_all('/(\d+)(\w)/', $i, $m);
//print_r($m);
foreach($m as $p) {
    if ($p[2]=='N') {
        $o.=str_repeat('=',$p[1]);
    } else {
        $o.=str_repeat('- ',(int)($p[1]/2)).($p%2?'-':'');
    }
}
echo(PREG_SET_ORDER);
echo($o);

Output
Performance
VLD
References
Branches

str_repeat: documentation ( source)
preg_match_all: documentation ( source)

preferences:dark modelive preview

50.89 ms | 402 KiB | 5 Q