Highlighting strings with different orders in PHP - php

Question

I am trying to highlight the strings. Whether they are in the sequence or not.
Like this -
$str = "star 5 hotel";
$keywords = "5 star hotels";
There is my function. It only highlights the last matching string.Here $str contains the search string. $keyword contains that string which i have stored into database
How can i highlight each matching string.
function highlight($str, $keyword) {
$str = "star hotel 5";
$keyword = "5 star hotel";
foreach($look as $find){
if(strpos($keyword, $find) !== false) {
if(!isset($highlight)){
$highlight[] = $find;
} else {
if(!in_array($find,$highlight)){
$highlight[] = $find;
}
}
}
}
if(isset($highlight)){
foreach($highlight as $replace){
$str = str_ireplace($replace,'<b>'.$replace.'</b>',$keyword);
$stra[] = str_ireplace($replace,'<b>'.$replace.'</b>',$keyword);
echo "<pre>";
print_r ($stra);
echo "</pre>";
}
}
echo $str."<br>";
die();
return $str;
}
But when i put this into an array and when i print this array $stra[]. It given me this
Array
(
[0] => 5 star hotel
[1] => 5 star hotel
[2] => 5 star hotel
)
I can not find way to combine these.
Output : -If have that keyword which is searching . then this must be Highlighted..
5 star hotel

Answer 1

This is what I assumed:-
I assume that you want to search each word of the search sting in the given string and if and only if all the words found then make string in bold (complete string).
Then do like below (Explanation given in comments):-
<?php
$search = "star 5 hotel"; //search string
$string = "5 star hotels"; // string in which you want to search
function highlight($search, $string) {
$new_search = array_unique(array_filter(explode(" " ,$search)));//explode search string
$found_count = 0; //create a counter
foreach($new_search as $find){ // iterate over search words array
if(strpos($string, $find) !== false) { // if word found in the string
$found_count +=1; // increase the counter
}
}
if(count($new_search) == $found_count){ //check that all words found in the string
$string = "<b>". $string ."</b>"; // if yes then make each word of the string bold
}
return $string; //return the newly modified string
}
echo highlight($search, $string); // echo newly modified string
Output:- https://eval.in/838325

Answer 2

You can use an array, and strtr() function. :)
$str = "the quick brown fox";
$keywords = "quick fox brown";
$matches = explode(" ",$keywords);
foreach ($matches as $v) {
$arr_matches[$v] = "<b>".$v."</b>";
}
$str = strtr($str, $arr_matches);

Answer 3

I know it's late but here is one way to make a double loop that will keep the bloat tags to a minimum and handle extra words in the sentence (in what I think is correct way).
It checks if the word is in match list, if yes loop til there is a not matching word.
Add the tags around those two words and go back to main loop.
$str = "star 5 hotel";
$strarr =explode(" ", $str);
$keywords = "a 5 star uinique hotel";
$arr = explode(" ", $keywords);
For($i=0; $i < count($arr) ; $i++){
If(in_array($arr[$i], $strarr)){
$j=$i;
While(in_array($arr[$j], $strarr) && $j < count($arr)){
$j++;
}
$j--;
$arr[$i] = "<b>" . $arr[$i];
$arr[$j] = $arr[$j] . "</b>";
$i=$j;
}
}
Echo implode(" ", $arr);
Output of above example:
a <b>5 star</b> uinique <b>hotel</b>
https://3v4l.org/pKE4X

Answer 4

You can use an array to achieve:
$str = 'This is some 5 start hotel in US';
$keyWords = ['5', 'star', 'hotel'];
$strToCheck = explode(' ', $str);
foreach ($keyWords as $k => $v)
{
if (in_array($v, $strToCheck)) {
//do something
}
}
this creates the string as an array, this means we can use in_array to check, then inside the if statement do whatever :)
references:
http://php.net/manual/en/function.in-array.php
http://php.net/manual/en/function.explode.php

Answer 5

Why don't you just iterate over your keywords and replace them:
$str = "This is a star 5 hotel located in New York";
$keywords = array("5","star","hotels");
foreach (array_expression as $key => $value){
$str = str_replace($value, "<b>".$value."</b>", $str);
}
Simple and failsafe if you don't have double keywords.
Or if your keywords need to be a something-separated string:
$str = "This is a star 5 hotel located in New York";
$keywords = "5 star hotel";
$arraykeywords = explode(" ",$keywords);
foreach (array_expression as $key => $value){
$str = str_replace($value, "<b>".$value."</b>", $str);
}
To filter double keywords use array_unique:
$str = "This is a star 5 hotel located in New York";
$keywords = "5 star hotel star";
$arraykeywords = array_unique(explode(" ",$keywords));
foreach (array_expression as $key => $value){
$str = str_replace($value, "<b>".$value."</b>", $str);
}
After a lot of discussion about regex (see the comments), this is the approach using #Andreas's regex:
$str = "This is a star 5 hotel located in New York";
$keywords = "5 star hotel star";
$pregsearch = "/".implode("|",array_unique(explode(" ",$keywords)))."/g"; //remove dups and join as regex
$str = preg_replace($pregsearch, "<b>$0</b>", $str);
Only recomended if your searching a large string.