Suppose I have this piece of text:
The <b>quick brown</b> fox jumps over the lazy dog
The quick brown fox jumps over the <b>lazy dog</b>
The quick brown fox <b>jumps over</b> the lazy dog
I want to get and extract all occurrences of this string from the text above:
<b>quick brown</b>
<b>lazy dog</b>
<b>jumps over</b>
Now I know I would need a while loop that checks until the end of the text and some string functions, but I'm not sure which ones.
Appreciate if someone could help with this.
Do like this..
<?php
$html='The <b>quick brown</b> fox jumps over the lazy dog
The <b>quick brown</b> fox jumps over the lazy dog
The <b>quick brown</b> fox jumps over the lazy dog';
function funcx($v)
{
return "<b>".$v."</b>";
}
preg_match_all('~<b>(.*?)<\/b>~', $html, $matches);
$results=array_map('funcx',$matches[1]);
var_dump($results);
OUTPUT:
array (size=3)
0 => string '<b>quick brown</b>' (length=18)
1 => string '<b>quick brown</b>' (length=18)
2 => string '<b>quick brown</b>' (length=18)
In case you would want to use regex, try the following:
/<b ?.*>(.*)<\/b>/
It will catch everything inside <b></b> tags including tags themselves.
You could expand the usage of the regex above to more than only one <b> tag by using simple function and pass a tag you would want to catch:
Example:
function getTextBetweenTags($string, $tagname)
{
$pattern = '/<'.$tagname.'>.*?<\/'.$tagname.'>/is';
preg_match_all($pattern, $string, $matches);
return $matches;
}
Usage:
$string = 'The <b>quick brown</b> fox jumps over the lazy dog \
The <b>quick black</b> fox jumps over the lazy dog \
The <b>quick white</b> fox jumps over the lazy dog';
$text = getTextBetweenTags($string, "b");
print_r($text);
Output:
Array
(
[0] => Array
(
[0] => <b>quick brown</b>
[1] => <b>quick black</b>
[2] => <b>quick white</b>
)
)
I have extended the function above for you, so it will work with multiple tags:
Example:
function getTextBetweenTags($string, $tagsname)
{
$tagsname = explode(',',$tagsname);
foreach ($tagsname as $tagname)
{
$pattern = '/<'.$tagname.'>.*?<\/'.$tagname.'>/is';
preg_match_all($pattern, $string, $matches);
$results[] = $matches;
}
return $results;
}
Usage:
$string = 'The <b>quick brown</b> fox jumps <strong>over</strong> the lazy dog \
The <b>quick black</b> fox jumps over the <span>lazy</span> dog \
The <b>quick white</b> fox jumps over the lazy dog';
$text = getTextBetweenTags($string, "b,strong,span"); // Single or multiple HTML tags
print_r($text);
Output:
Array
(
[0] => Array
(
[0] => Array
(
[0] => <b>quick brown</b>
[1] => <b>quick black</b>
[2] => <b>quick white</b>
)
)
[1] => Array
(
[0] => Array
(
[0] => <strong>over</strong>
)
)
[2] => Array
(
[0] => Array
(
[0] => <span>lazy</span>
)
)
)
$text = "The <b>quick brown</b> fox jumps over the lazy dog
The <b>quick brown</b> fox jumps over the lazy dog
The <b>quick brown</b> fox jumps over the lazy dog";
$part = "<b>quick brown</b>";
$count = substr_count($text, $part);
for($i=0;$i<$count;$i++)
{
echo $part."<br>";
}
OUTPUT
quick brown
quick brown
quick brown
If you replace
echo $part."<br>";
with
echo htmlspecialchars($part)."<br>";
OUTPUT
<b>quick brown</b>
<b>quick brown</b>
<b>quick brown</b>