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Delete Last Comma in a string

/ Published in: PHP
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This is the PHP equivalent to http://snipplr.com/view/12074/delete-last-comma/

You will use only the deleteLastComma() function!

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  1. function instrrev($n,$s) {
  2. 	$x=strpos(chr(0).strrev($n),$s)+0;
  3. 	return (($x==0) ? 0 : strlen($n)-$x+1);
  4.  }
  5.  
  6. function mid($s,$x,$w="") {  //$w is optional
  7. 	if ($w) {return substr($s,$x-1,$w);}
  8.     else {return substr($s,$x-1);}
  9. }
  10.  
  11. function deleteLastComma($valStr) {
  12. 	$lastCommaPos = instrrev($valStr, ",");
  13. 	$valStr = mid($valStr, 1, $lastCommaPos - 1);
  14. 	return  $valStr;
  15. }

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