note 87489 deleted from function.str-replace by philip

Note Submitter: gabriel dot totoliciu at ddnet dot ro ---- As 'max at efoxdesigns dot com' said, when you try to replace a string that occurs in the $search array after the same character occurs in the $replace character, you don't usually get what you want. examples: <?php $search=array("beer", "graffiti", "programming"); $replace=array("graffiti", "motorcycles", "chips"); $string="I like beer, graffiti and programming."; var_dump(str_replace($search, $replace, $string)); // you would expect to see: // string(39) "I like graffiti, motorcycles and chips." // well.. what you actually see is: // string(42) "I like motorcycles, motorcycles and chips." ?> I've made a function (stru_replace) that replaces everything correctly. It has some downsides, as it does not implement all the functionality of str_replace: <?php $search=array("beer", "graffiti", "programming"); $replace=array("graffiti", "motorcycles", "chips"); $string="I like beer, graffiti and programming."; var_dump(str_replace($search, $replace, $string)); //string(39) "I like graffiti, motorcycles and chips." ?> I'm sure that the functions can be improved. Anyway, I guess they are a bit useful :D <?php //returns the key of the minimum value within the array function minkey($array) { $first=true; $mkey=false; $mvalue=false; foreach($array as $key=>$value) { if (is_numeric($value)) { if ($mvalue>$value || $first) { $mvalue=$value; $mkey=$key; if ($first) $first=false; } } } return $mkey; } //returns the key and the position of the first needle found withing the (string)haystack function strposfirst($haystack, $needles, $currentpos=0) { $positions=array(); foreach($needles as $key=>$value) $positions[$key]=strpos($haystack,$value,$currentpos); $minkey=minkey($positions); if ($minkey===false) return array(false, false); return array($minkey, $positions[$minkey]); } //third parameter must be a string function stru_replace($search, $replace, $string) { $newString=""; // the function only implements functionality for the $search and $replace parameters // as arrays that have the same ammount of elements if (is_array($search) && is_array($replace)) { if (count($search)!=count($replace)) throw new ErrorException("The \$search and \$replace parameters must have the same number of elements"); $oCPos=0; // current position inside old string $done=false; // determines when we searched all the string while(!$done) { //get the key and position of the first found element list($key, $position)=strposfirst($string, $search, $oCPos); //if there is a found element, get concatenate the string before it, and replace the string if ($position!==false) { // the string before the needle is concatenated in the new string $newString.=substr($string, $oCPos, $position-$oCPos); // the needle is replaced $newString.=$replace[$key]; //add the with of the length of the string before the needle + the length of the new key $oCPos+=$position-$oCPos+strlen($search[$key]); } //set the done flag when nothing is found (position is false) else $done=true; } //concatenate the string after the last needle $newString.=substr($string, $oCPos); return $newString; } else return str_replace($search, $replace, $string); } ?> I hope this helps :) If I'll change the functions, you'll find them here http://pb.dev.ddnet.ro/phpLecture/issue1.php