- substr: documentation ( source)
- print_r: documentation ( source)
- implode: documentation ( source)
- explode: documentation ( source)
<?php
echo "<pre>";
$A = "µPhysik I~1µ";
$Ar = explode("µµ", substr($A, 1, -1));
print_r($Ar);
$A = count($Ar) > 0 ? "µ".implode("µµ", $Ar)."µ" : "";
print_r($A);
$Ar = explode("µµ", substr($A, 1, -1));
print_r($Ar);
print_r(explode("~", $Ar[0]));
$A = count($Arrr) > 0 ? "µ".implode("µµ", $Arrr)."µ" : "";
print_r($A);
echo "</pre>";