preg_match_all output all h tags with type

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i want to create a table of all the h tags for a specific page (seo reasons) and populate a table with them.

        $str = file_get_contents($Url);
        if(strlen($str)>0){
            preg_match_all(" /<(h\d*)>(\w[^<]*)/i",$str,$headings);

            foreach ($headings as $val) {
                echo "type: " . $val[1] . "\n";
                echo "content: " . $val[2] . "\n";
            }
        }

at the moment i am just echoing them out and getting weird results this is my first time ever using regular expressions so i figured its prob something wrong there.

also if someone knows of a good tutorial on handling the array preg_match_all returns that would be great.

Your regex was already working fine. But preg_match_all returns the result arrays typically ordered by match groups. You can however add the PREG_SET_ORDER flag as fourth parameter to preg_match_all, which is how your foreach expects it:

preg_match_all("/<(h\d*)>(\w[^<]*)/i",$str,$headings, PREG_SET_ORDER);

Btw, this is a perfectly legitimate use (and unlikely to fail) use of regular expressions, if we can assume you are working on your own applications output to add an headline table.

preg_match_all - Manual, Searches subject for all matches to the regular expression given in pattern and puts that matched full pattern, and $out[1] contains array of strings enclosed by tags. 1 => array(0 => 'G', 1 => 'H'), //output length of string (just so you see how f**king long it is) <input type= "text" name ='my "name' value = "nothin really. PHP preg_match_all is a search-based function in the PHP programming language. It returns the total number of the matches found in a string. We can also see that it uses the regular expression pattern as a parameter to complete the searching process.

Use this method to return an associative array with the Heading Tags, their types and instances:

public function getHeadingTags()
{
    preg_match_all( "#<h(\d)[^>]*?>(.*?)<[^>]*?/h\d>#i", 
                    $this->html, 
                    $matches,
                    PREG_PATTERN_ORDER
                  );
    $headings = array();
    foreach ($matches[1] as $key => $heading_key) {
        $headings["h$heading_key"][] = $matches[2][$key];
    }

    ksort($headings);
    return $headings;
}

How to Extract Heading Content (h1, h2, etc.) from an HTML String , Here is a simple regular expression to extract all those headings: preg_match_all ( '|<h[^>]+>(.*)</h[^>]+>|iU', $html, $headings );. where $html� I was unhappy though, that preg_match_all() stores the data twice (requiring twice the memory), one array for all the full pattern matches, and one array for all the sub pattern matches. You could probably write your own function that overcame this.

I want to know more about regular expressions, you better buy a good book. Or just google for good tutorials. Personally I like regular-expressions.info

All the information about preg_match_all function can be found at official documentation here. PHP community usually share some useful code at manual pages, I believe you can find there any information you want.

php > $ch = curl_init('http://stackoverflow.com/questions/7883392/preg-match-all-output-all-h-tags-with-type');                                              
php > curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); $data = curl_exec($ch);
php > preg_match_all("!<h(\d)[^>]*>(.*?)</h\\1>!ism",$data,$headings);
php > var_export($headings);
array (                     
  0 =>                      
....  
2 =>
  array (
    0 => '<a href="/questions/7883392/preg-match-all-output-all-h-tags-with-type" class="question-hyperlink">preg_match_all output all h tags with type</a>',
    1 => '',
    2 => '
            Know someone who can answer?
            Share a <a href="/q/7883392">link</a> to this question via
            <a href="mailto:?subject=Stack%20Overflow%20Question&amp;body=preg_match_all%20output%20all%20h%20tags%20with%20type%0Ahttp%3a%2f%2fstackoverflow.com%2fq%2f7883392">email</a>,
            <a href="http://twitter.com/share?url=http%3a%2f%2fstackoverflow.com%2fq%2f7883392&amp;text=preg_match_all%20output%20all%20h%20tags%20with%20type">twitter</a>, or
            <a href="http://www.facebook.com/sharer.php?u=http%3a%2f%2fstackoverflow.com%2fq%2f7883392&amp;t=preg_match_all%20output%20all%20h%20tags%20with%20type">facebook</a>.
        ',
    3 => 'Your Answer',
    4 => '
            Browse other questions tagged <a href="/questions/tagged/php" class="post-tag" title="show questions tagged \'php\'" rel="tag">php</a> <a href="/questions/tagged/preg-match-all" class="post-tag" title="show questions tagged \'preg-match-all\'" rel="tag">preg-match-all</a>
                or <a href="/questions/ask">ask your own question</a>.
        ',
    5 => 'Hello World!',
    6 => 'Related',
  ),
)

PHP Regex: Cheat Sheet & Real-World Examples 2020, This handy code snippet will find and print the text within the <title> and </title> tags of a HTML page. $fp = fopen("https://catswhocode.com/blog","r"); while (!feof ($� * Replaces anchor tags with text * - Will search string and replace all anchor tags with text (case insensitive) * * How it works: * - Searches string for an anchor tag, checks to make sure it matches the criteria * Anchor search criteria: * - 1 - <a (must have the start of the anchor tag )

If you are parsing the entire HTML content of a page, I would recommend you try PHP's DomDocument:

$str = file_get_contents($Url);

$dom = new DomDocument();
$dom->loadHTML($str);           

$hs = array();
for($type=1; $type<6; $type++)
{
  $h_es = $dom->getElementsByTagName('h'.$type);
  foreach($h_es as $h)
  {
    $hs[] = array('type'=>$type, 'content'=>$h->textContent);
  }
}

print_r($hs);

PHP/String/preg match all — Web эксперт, Capturing HTML headings Extracting text from HTML tags n"; print " preg_match() array: "; var_dump($matches); print "preg_match_all() array: " int order]) There are two possible types of order: PREG_PATTERN_ORDER is the default. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.

This method can also be used (for get all tags H). I tested it and it works. Because I needed it myself.

$str = file_get_contents($Url);
preg_match_all("|<h+[1-6](.*?)<\/h[1-6]+>|", $str , $matches_h_tag);
 $h_tags = "";
for($i=0; $i <= count($matches_h_tag[0]); $i++){
$h_tags .= $matches_h_tag[0][$i]; 
}
 echo $h_tags;

simple and fast method for get all tags (h)

Easy regular expressions and lessons, For example, if we are going to search for html tags <h1> , <h2> , <h3> In JavaScript, regular expressions (or regex ) are implemented as their own type of object (such as the RegExp object). Once or not at all (0 – 1). Last visit was: Tue Jul 28, 2020 11:28 pm: It is currently Tue Jul 28, 2020 11:28 pm

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int preg_match_all (string pattern, string string, array pattern_array [, int order]); Definition and Usage. The preg_match_all() function matches all occurrences of pattern in string. It will place these matches in the array pattern_array in the order you specify using the optional input parameter order. There are two possible types of order −

Comments
  • First you shouldn't use regex to parse html/xml etc. unless your life somehow depends on it. Secondly I have no idea what "type" means? Could you provide concrete input and desired output?
  • sorry type is the kind of h tag (h1, h2, h3 etc) i want a table type and content(the actual text) what should i use?
  • You are just missing PREG_SET_ORDER as fourth parameter to preg_match_all.
  • thanks heaps mario can you post the code so i can mark as answered