CODEWITHSUNDEEP
php
Kaleem Sajid
Kaleem Sajid

Reputation: 230

Php string processing

I need to find <p> tag inside a string. Then I want to store the string from (including)

tag into another variable.

For example I have string name firstString;

firstString = "<div id='tab-1'><p>This is first string</p></div>"

I want second string to be

secondString = "<p>This is first string</p>"

I need only first <p> tag.

Upvotes: 1

Views: 302

Answers (3)

Evert S
Evert S

Reputation: 19

/* find opening tag */
$strPosBegin = strstr($firstString,"<p>");

if $strPosBegin != 0 {

    /* find position of closing tag */
    $strPosEnd = strstr($firstString,"</p>");

    /* adjust for the length of closing tag */
    $strPosEnd = $strPosEnd + 3;

    /* calculate difference, but need to add 1 */
    $strLength = $strPosEnd - $strPosBegin + 1;

     /* use substr to lift your search string out of $firstString
    $secondString = substr($firstString, $strPosBegin, $strLength);
}

Upvotes: 0

Shail
Shail

Reputation: 1575

DOMDocument::loadHTML. Maybe not the fastest option, but should be simple.

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

$xp = new DOMXPath($dom);

$res = $xp->query('//p');

$firstParagraph = $res[0]->nodeValue;

Upvotes: 6

moopet
moopet

Reputation: 6185

You can use a simple regex to grab this substring.

$firstString = "<div id='tab-1'><p>This is first string</p></div>";
preg_match("#(<p>.+</p>)#", $firstString, $out);
echo $out[1];

There are other ways to do it if you know more precisely how the string is formed, or if you wish to pull out multiple substrings you can use preg_match_all instead.

If this is for scraping something from HTML in general though, you should be using a dedicated system like DOMDocument.

Upvotes: 0

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