A better example would be this:
$string = "That is a very nice ford mustang, if only every other ford was quite as nice as this honda";
I want to replace the car names with a link for manufacturer and model if they match, or just manufacturer, but if there is a make and model it puts links within links if you use str replace for example....
$remove = array("ford mustang","ford","honda");
$replaceWith = array("<a href='fordID'>ford</a>","<a href='fordmustangID'>ford mustang</a>","<a href='hondaID'>honda</a>");
This gives the result:
"That is a very nice <a href='<a href='fordmustangID'>ford mustang</a>ID'><a href='fordmustangID'>ford mustang</a></a>, if only every other <a href='fordmustangID'>ford mustang</a> was quite as nice as this <a href='hondaID'>honda</a>"
I only want it to create a hyperlink if there isn't one already like this:
"That is a very nice <a href='fordmustangID'>ford mustang</a>, if only every other <a href='fordID'>ford</a> was quite as nice as this <a href='hondaID'>honda</a>"
First, press keyboard shortcuts “Alt+ F9”. You can see all hyperlinks turn into their “Link” parts now. Press “Ctrl + H” to open the “Find and Replace” dialog box.
Took me a good while, but here's what I came up with:
function replaceLinks($replacements, $string){
foreach($replacements as $key=>$val){
$key=strtolower((string)$key);
$newReplacements[$key]=array();
$newReplacements[$key]['id']=$val;
//strings to make sure the search isn't in front of
$newReplacements[$key]['behinds']=array();
//strings to make sure the search isn't behind
$newReplacements[$key]['aheads']=array();
//check for other searches this is a substring of
foreach($replacements as $key2=>$val2){
$key2=(string)$key2;
/*
//debugging
$b = ($key=='11 22'&&$key2=='11 22 33');
if($b){
l('strlen $key2: '.strlen($key2));
l('strlen $key: '.strlen($key));
l('strpos: '.(strpos($key2,$key)));
}
*/
//the second search is longer and the first is a substring of it
if(strlen($key2)>strlen($key) && ($pos=strpos($key2,$key))!==false){
//the first search isn't at the start of the second search ('the ford' and 'ford')
if($pos!=0){
$newReplacements[$key]['behinds'][]=substr($key2,0,$pos);
}
//it's not at the end ('ford' and 'fords')
if(($end=$pos+strlen($key))!=strlen($key2)){
$newReplacements[$key]['aheads'][]=substr($key2,$end);
}
}
}
}
foreach($newReplacements as $key=>$item){
//negative lookbehind for words or >
$tmp="/(?<![\w>=])";
//negative lookbehinds for the beginnings of other searches that this search is a subtring of
foreach($item['behinds'] as $b){
$tmp.="(?<!$b)";
}
//the actual search
$tmp.="($key)";
//negative lookaheads for ends of other searches that this is a substring of.
foreach($item['aheads'] as $a){
$tmp.="(?!$a)";
}
//case insensitive
$tmp.='/ie';
$replacementMatches[]=$tmp;
}
return preg_replace($replacementMatches,'"<a href=\"".$newReplacements[strtolower("$1")]["id"]."\">$1</a>"' ,$string);
}
Pass it an array such as the one you were talking about:
$replaceWith = array('ford mustang'=>123,'ford'=>42,'honda'=>324);
and a string:
$string = "That is a very nice ford mustang, if only every other ford was quite as nice as this honda";
echo replaceLinks($replaceWith,$string);
It gives precedence to larger string keys, so if you have ford
and ford mustang
, it will replace ford mustang
with the link.
Not very practical, but might work.
$string = "That is a very nice ford mustang, if only every other ford was quite as nice as this honda";
$remove = array("/(?<![\w>])ford mustang(?![\w<])/",'/(?<![>\w])ford(?! mustang)(?![<\w])/',"/(?<![>\w])honda(?![<\w])/");
$replaceWith = array("<a href='fordmustangID'>ford mustang</a>","<a href='fordID'>ford</a>","<a href='hondaID'>honda</a>");
echo preg_replace($remove, $replaceWith,$string);
I used regular expressions with negative lookaheads and lookbehinds to make sure the portion of the string we're replacing isn't part of an alphanumeric sequence (like 12ford23
or afford
) or touching the start or end tag of an element.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With