Comments on: PHP highlight search keywords

By: Benjamin

Benjamin — Wed, 11 Jan 2012 14:53:43 +0000

This tutorial is definitely the best I’ve seen for highlighting search strings in search results because it actually replaces the strings with the correct casing. Many of the other methods I’ve seen online replace the result text with the casing that was typed in the search.

The only issue I had to deal with was if someone started typing nothing but spaces. It gets a little crazy.

By: Pertneer

Pertneer — Fri, 30 Sep 2011 15:31:33 +0000

This solution seams to have resolved your issue. If you concatenate the string into a new string you eliminate the issue of searching through the new html text that you create in the foreach loop. Then I cleared the $text to prevent any other unforeseen issues.

class highlight
{
public $output_text;

function __construct($text, $words)
{
$split_words = explode( ” ” , $words );
$output = “”;
foreach ($split_words as $word)
{
$color = self::generate_colors();
if(strlen($word) < 3){

}else{
$text = preg_replace("|($word)|Ui" , "$1” , $text );
}
$output .= $text;
$text = “”;
}
$this->output_text = $output;
}

private function rgbhex($red, $green, $blue)
{
return sprintf(‘#%02X%02X%02X’, $red, $green, $blue);
}

private function generate_colors()
{
$red = rand( rand(60,100) , rand(200,252) );
$green = rand( rand(60,100) , rand(200,252) );
$blue = rand( rand(60,100) , rand(200,252) );

$color = self::rgbhex( $red , $green , $blue );
return $color;
}
}

By: bystwn22

bystwn22 — Wed, 27 Jul 2011 23:46:52 +0000

i know its old topic but, its for newers
i just edited and fixed the search highlight problem, now its work with html
class highlight {
public $output_text;
function __construct($text, $words) {
$split_words = explode(” “, $words );
foreach ($split_words as $word) {
$color = self::generate_colors();
$color2 = self::generate_colors2();
$text = preg_replace(“|\b($word)\b|se”, ‘”$1“‘, $text );
}
$this->output_text = $text;
}

private function rgbhex($red, $green, $blue) {
return sprintf(‘#%02X%02X%02X’, $red, $green, $blue);
}

private function generate_colors() {
$red = rand( rand(200,252) , rand(200,252) );
$green = rand( rand(200,252) , rand(200,252) );
$blue = rand( rand(200,252) , rand(200,252) );

$color = self::rgbhex( $red , $green , $blue );
return $color;
}
private function generate_colors2() {
$red = rand( rand(40,100) , rand(100,252) );
$green = rand( rand(40,100) , rand(100,252) );
$blue = rand( rand(40,100) , rand(100,252) );

$color = self::rgbhex( $red , $green , $blue );
return $color;
}
}

By: Constantin Boiangiu

Constantin Boiangiu — Mon, 20 Jun 2011 09:06:02 +0000

Don’t quite get it. Can you please detail a bit?

By: lisam

lisam — Fri, 17 Jun 2011 08:23:48 +0000

how can i make this happen to a table listing search?
like when i use while() statement, then the result shows in a table with so many rows.

help :(

By: Andy Marks

Andy Marks — Thu, 02 Jun 2011 13:35:09 +0000

Great post. One item I needed to add for my site was to ensure ONLY full words were highlighted. I accomplished this by modifying:

$text = preg_replace(“|($word)|Ui” ,
“$1” , $text );

to:

$text = preg_replace(“|(\b$word\b)|Ui” ,
“ $1” , $text );

there are three edits. adding \b before and after $word are the first and second edit. lastly, placing a space before $1.

Thanks again for the class, works wonders.

By: blogDAI « >> Produccions d'en Kotya <<

blogDAI « >> Produccions d'en Kotya << — Mon, 24 Jan 2011 00:28:49 +0000

[...] de termes trobats als posts retornats. Per aconseguir-ho s’ha implementat la classe highlight del web [...]

By: Udesh Jayakody

Udesh Jayakody — Fri, 21 Jan 2011 10:37:49 +0000

Thanks it works

By: Constantin Boiangiu

Constantin Boiangiu — Tue, 28 Dec 2010 09:21:48 +0000

Hmm, no solution for that yet. This is a very old example about what can be done with regular expressions and it’s for demo purposes only. I’ll try and expand that a little, but this will probably happen during the next year, enjoying holidays now.

By: Andrew

Andrew — Sun, 26 Dec 2010 23:56:42 +0000

Hi guys! First of all, good work! I’m trying to create a similar code, with str_replace. I don’t know exactly what the difference is, but i does no matter. The Problem I have, and this code has also, (and haven’t found a solution for this yet), if you type in some of the following keywords: span, style, backgroung etc. the result breaks. For example:
$highlight = new highlight($text , ‘lorem dolor back’);
it’s a big problem i think. And it is caused by the foreach() function.
First it replaces the words ‘lorem’ to: lorem
Then it searches the word ‘back’ and replaces it, but it searches in the previous text with the HTML tags.
So the result HTML code is that:
background:#AD7CA7;\”>lorem

If you have some soluton please share with me, Thanks