如何只从php字符串中突出显示字符？

Question

I have a string and some words, i want to highlight those words which match with string, and also i want to print only those words which are highlighted, like if apple matches, then only apple must be printed.

$string = "apple computer";

$keyword = "apple,orange,bike";

I am using the following function to highlight specific characters in a string.

$str = preg_replace("/($keyword)/i","<span style='color:orange;'>$0</span>",$string);

The problem is I want to show only those characters which are highlighted, currently it shows all the characters.

Answer 1

This would meet your need.

$string = " apple computer orange";
$keywords = "apple, orange";

$exp_kwd = explode(",", $keywords);

$res = "<span style='color:orange;'>";

foreach($exp_kwd as $val){

    if(strpos($string, trim($val))){

       $res .=  $val." ";
    }
}
$res = $res."</span>";

echo $res;

Answer 2

Hopefully this also will work

$string = "apple computer orange tested";
$keyword = "apple,orange,bike,tested";

$pattern="/".str_replace(",","/,/",$keyword)."/";
$pattern=explode(",",$pattern);

$string=explode(" ",$string);
$keyword =explode(",",$keyword);

$string=implode(",",(preg_filter($pattern, $keyword, $string)));
echo $string="<span style='color:orange;'>$string</span>";

Answer 3

$string = "Im On  #Here";
$keyword = "#";

$var = strrchr($string,$keyword);
if(empty($var))
{
    echo 'No Occerunce Found';
}
else
{
    echo '<span style="color:orange;">'.$var.'</span>';
}

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