The keepFirstImgs() function presented in this page can be used in PHP to keep the first Nr IMG tags into a string, and Strip all the other <img>s.
- The function receives the number of the first <img> tags to keep ($nrimg), and the string with the HTML text ($str); returns the string with the other IMG tags removed.
// Function to keep first $nrimg IMG tags in $str, and strip all the other <img>s
// From: http://coursesweb.net/php-mysql/
function keepFirstImgs($nrimg, $str) {
  // gets an array with al <img> tags from $str
  if(preg_match_all('/(\<img[^\>]+\>)/i', $str, $mt)) {
    // gets array with the <img>s that must be stripped ($nrimg+), and removes them
    $remove_img = array_slice($mt[1], $nrimg);
    $str = str_ireplace($remove_img, '', $str);
  }
  return $str;
}
- Example:
<?php
// Function to keep first $nrimg IMG tags in $str, and strip all the other <img>s
// From: http://coursesweb.net/php-mysql/
function keepFirstImgs($nrimg, $str) {
  // gets an array with al <img> tags from $str
  if(preg_match_all('/(\<img[^\>]+\>)/i', $str, $mt)) {
    // gets array with the <img>s that must be stripped ($nrimg+), and removes them
    $remove_img = array_slice($mt[1], $nrimg);
    $str = str_ireplace($remove_img, '', $str);
  }
  return $str;
}

// Test, keeps the first two IMG tags in $str
$str = 'First img: <img src="img1.jpg" alt="img 1" width="30" />,
 second image: <img src="img_2.jpg" alt="img 2" width="30">,
 another Img tag <img src="img3.jpg" alt="img 3" width="30" />,
 and another image <img src="img_5.jpg" alt="imgage 5" width="30" /> ... etc.';
$str = keepFirstImgs(2, $str);
echo $str;
/* Output:
 First img: <img src="img1.jpg" alt="img 1" width="30" />,
 second image: <img src="img_2.jpg" alt="img 2" width="30">,
 another Img tag , and another image  ... etc.
*/
?>

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which tag is used to add lists into <ul> and <ol> elements?
<dt> <dd> <li>
<ul>
 <li>http://coursesweb.net/html/</li>
 <li>http://coursesweb.net/css/</li>
</ul>
Which value of the "display" property creates a block box for the content and ads a bullet marker?
block list-item inline-block
.some_class {
  display: list-item;
}
Which instruction converts a JavaScript object into a JSON string.
JSON.parse() JSON.stringify eval()
var obj = {
 "courses": ["php", "javascript", "ajax"]
};
var jsonstr = JSON.stringify(obj);
alert(jsonstr);    // {"courses":["php","javascript","ajax"]}
Indicate the PHP class used to work with HTML and XML content in PHP.
stdClass PDO DOMDocument
$strhtml = '<body><div id="dv1">CoursesWeb.net</div></body>';
$dochtml = new DOMDocument();
$dochtml->loadHTML($strhtml);
$elm = $dochtml->getElementById("dv1");
echo $elm->nodeValue;    // CoursesWeb.net
Keep the first Nr IMG tags, Strip all the others

Last accessed pages

  1. Fancy Pants (421)
  2. Create simple Website with PHP (15240)
  3. Transparent Background, but not the text-content on it (1227)
  4. Ajax-PHP Chat Script (32266)
  5. Drag Racer V3 (15436)

Popular pages this month

  1. Qwop (7896)
  2. Drag Racer V3 (5541)
  3. Bubbles3 (2160)
  4. List with All the Games (1834)
  5. Flash Games - Free online Games (1718)