In PHP, get entire word from MySQL search result using "LIKE" - php

Question

what I want is:
Let's supose I searched "goo" using a query that goes like this: ...WHERE message LIKE '%goo%' and it returned me a result, for example I love Google to make my searches, but I'm starting to worry about privacy, so it will be displayed as a result, because the word Google matches my search criteria.
How do I, based on my search string save this entire Google result on a variable?
I need this because I'm using a regular expression that will highlight the searched word and display content before and after this result, but it's only working when the searched word matches exactly the word in the result, and also it's malconstructed, so it won't work well with words that are not surrounded by space.
This is the regular expression code
<?=preg_replace('/^.*?\s(.{0,'.$size.'})(\b'.$_GET['s'].'\b)(.{0,'.$size.'})\s.*?$/',
'...$1<strong>$2</strong>$3...',$message);?>
What I want is that change this $_GET['s'] to my variable which will contain the whole word found in my query string.
How do I achieve this ?

Answer 1

I bet it will be easier to change your regular expression to check any word containing the term, what about:
<?=preg_replace('/^.*?(.{0,'.$size.'})(\b\S*'.$_GET['s'].'\S*\b)(.{0,'.$size.'}).*?$/i',
'...$1<strong>$2</strong>$3...',$message);?>

Answer 2

I read your discussion on this and more robust implementation might be in order. Especially taking your need to support diacritics into account. Using a single regular expression to fix all your problems might seem tempting, but the more complicated it becomes the harder it gets to maintain or expand upon. To quote Jamie Zawinski
Some people, when confronted with a problem, think “I know, I'll use regular expressions.” Now they have two problems.
As I have problems with iconv on my local machine, I used a more simple implementation instead, feel free to use something more complicated or robust if your situation requires it.
I use a simple regular expression in this solution to get a set of alphanumeric characters only (also known as a "word"), the part in the regular expression that reads \p{L}\p{M} makes sure we also get all the multibyte characters.
You can see this code working on IDEone.
<?php
function stripAccents($p_sSubject) {
$sSubject = (string) $p_sSubject;
$sSubject = str_replace('æ', 'ae', $sSubject);
$sSubject = str_replace('Æ', 'AE', $sSubject);
$sSubject = strtr(
utf8_decode($sSubject)
, utf8_decode('àáâãäåçèéêëìíîïñòóôõöøùúûüýÿÀÁÂÃÄÅÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝ')
, 'aaaaaaceeeeiiiinoooooouuuuyyAAAAAACEEEEIIIINOOOOOOUUUUY'
);
return $sSubject;
}
function emphasiseWord($p_sSubject, $p_sSearchTerm){
$aSubjects = preg_split('#([^a-z0-9\p{L}\p{M}]+)#iu', $p_sSubject, null, PREG_SPLIT_DELIM_CAPTURE);
foreach($aSubjects as $t_iKey => $t_sSubject){
$sSubject = stripAccents($t_sSubject);
if(stripos($sSubject, $p_sSearchTerm) !== false || mb_stripos($t_sSubject, $p_sSearchTerm) !== false){
$aSubjects[$t_iKey] = '<strong>' . $t_sSubject . '</strong>';
}
}
$sSubject = implode('', $aSubjects);
return $sSubject;
}
/////////////////////////////// Test \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
$aTest = array(
'goo' => 'I love Google to make my searches, but I`m starting to worry about privacy.'
, 'peo' => 'people, People, PEOPLE, peOple, people!, people., people?, "people, people" péo'
, 'péo' => 'people, People, PEOPLE, peOple, people!, people., people?, "people, people" péo'
, 'gen' => '"gente", "inteligente", "VAGENS", and "Gente" ...vocês da física que passam o dia protegendo...'
, 'voce' => '...vocês da física que passam o dia protegendo...'
, 'o' => 'Characters like æ,ø,å,Æ,Ø and Å are used in Denmark, Sweden and Norway'
, 'ø' => 'Characters like æ,ø,å,Æ,Ø and Å are used in Denmark, Sweden and Norway'
, 'ae' => 'Characters like æ,ø,å,Æ,Ø and Å are used in Denmark, Sweden and Norway'
, 'Æ' => 'Characters like æ,ø,å,Æ,Ø and Å are used in Denmark, Sweden and Norway'
);
$sContent = '<dl>';
foreach($aTest as $t_sSearchTerm => $t_sSubject){
$sContent .= '<dt>' . $t_sSearchTerm . '</dt><dd>' . emphasiseWord($t_sSubject, $t_sSearchTerm) .'</dd>';
}
$sContent .= '</dl>';
echo $sContent;
?>

Answer 3

I don't understand the importance of matching everything else in the search string, wouldn't this simply be enough?
<?=preg_replace('/\b\S*'.$GET['s'].'\S*\b/i', '<strong>$0</strong>', $message);?>
As far as I can tell, you are only putting the matched word in a html tag, but not doing anything to the rest of the string?
The above regex works fine for cases where you are only matching whole words, captures multiple matches within a string (should there be more than one) and also works fine with case insensitivity.