I'm trying to find ALL images in my blog posts with regex. The code below returns images IF the code is clean and the SRC tag comes right after the IMG tag. However, I also have images with other attributes such as height and width. The regex I have does not pick that up... Any ideas?
The following code returns images that looks like this:
<img src="blah_blah_blah.jpg">
But not images that looks like this:
<img width="290" height="290" src="blah_blah_blah.jpg">
Here is my code
$pattern = '/<img\s+src="([^"]+)"[^>]+>/i';
preg_match($pattern, $data, $matches);
echo $matches[1];
Use DOM or another parser for this, don't try to parse HTML with regular expressions.
$html = <<<DATA
<img width="290" height="290" src="blah.jpg">
<img src="blah_blah_blah.jpg">
DATA;
$doc = new DOMDocument();
$doc->loadHTML($html); // load the html
$xpath = new DOMXPath($doc);
$imgs = $xpath->query('//img');
foreach ($imgs as $img) {
echo $img->getAttribute('src') . "\n";
}
Output
blah.jpg
blah_blah_blah.jpg
Ever think of using the DOM object instead of regex?
$doc = new DOMDocument();
$doc->loadHTML('<img src="http://example.com/img/image.jpg" ... />');
$imageTags = $doc->getElementsByTagName('img');
foreach($imageTags as $tag) {
echo $tag->getAttribute('src');
}
You'd better to use a parser, but here is a way to do with regex:
$pattern = '/<img\s.*?src="([^"]+)"/i';
The problem is that you only accept \s+ after <img. Try this instead:
$pattern = '/<img\s+[^>]*?src="([^"]+)"[^>]+>/i';
preg_match($pattern, $data, $matches);
echo $matches[1];
Try this:
$pattern = '/<img\s.*?src=["\']([^"\']+)["\']/i';
Single or double quote and dynamic src attr position.
Related
I am using preg_replace to delete from $content certain <img>:
$content=preg_replace('/(?!<img.+?id="img_menu".*?\/>)(?!<img.+?id="featured_img".*?\/>)<img.+?\/>/','',$content);
When I am now displaying the content using wordpress the_content function, I did indeed remove the <img>s from $content:
I'd like beforehand to get this images to place them elsewhere in the template. I am using the same regex pattern with preg_match_all:
preg_match_all('/(?!<img.+?id="img_menu".*?\/>)(?!<img.+?id="featured_img".*?\/>)<img.+?\/>/', $content, $matches);
But I can't get my imgs?
preg_match_all('/(?!<img.+?id="img_menu".*?\/>)(?!<img.+?id="featured_img".*?\/>)<img.+?\/>/', $content, $matches);
print_r($matches);
Array ( [0] => Array ( ) )
assuming and hopefully you are using php5, this is a task for DOMDocument and xpath. regex with html elements mostly will work, but check the following example from
<img alt=">" src="/path.jpg" />
regex will fail. since there aren't many guarantees in programming, take the guarantee that xpath will find EXACTLY what you want, at a perfomance cost, so to code it:
$doc = new DOMDocument();
$doc->loadHTML('<span><img src="com.png" /><img src="com2.png" /></span>');
$xpath = new DOMXPath($doc);
$imgs = $xpath->query('//span/img');
$html = '';
foreach($imgs as $img){
$html .= $doc->saveXML($img);
}
now you have all img elements in $html, use str_replace() to remove them from $content, and from there you can have a drink and be pleased that xpath with html elements is painless, just a little slower
ps. i couldnt be be bother understanding your regex, i just think xpath is better in your situation
at the end i have used preg_replace_callback:
$content2 = get_the_content();
$removed_imgs = array();
$content2 = preg_replace_callback('#(?!<img.+?id="featured_img".*?\/>)(<img.+? />)#',function($r) {
global $removed_imgs;
$removed_imgs[] = $r[1];
return '';
},$content2);
foreach($removed_imgs as $img){
echo $img;
}
I am trying to extract some strings from the source code of a web page which looks like this :
<p class="someclass">
String1<br />
String2<br />
String3<br />
</p>
I'm pretty sure those strings are the only things that end with a single line break(). Everything else ends with two or more line breaks. I tried using this :
preg_match_all('~(.*?)<br />{1}~', $source, $matches);
But it doesn't work like it's supposed to. It returns some other text too along with those strings.
DOMDocument and XPath to the rescue.
$html = <<<EOM
<p class="someclass">
String1<br />
String2<br />
String3<br />
</p>
EOM;
$doc = new DOMDocument;
$doc->loadHTML($html);
$xp = new DOMXPath($doc);
foreach ($xp->query('//p[contains(concat(" ", #class, " "), " someclass ")]') as $node) {
echo $node->textContent;
}
Demo
I wouldn't recommend using a regular expression to get the values. Instead, use PHP's built in HTML parser like this:
$dom = new DOMDocument();
$dom->loadHTML($source);
$xpath = new DOMXPath($dom);
$elements = $xpath->query('//p[#class="someclass"]');
$text = array(); // to hold the strings
if (!is_null($elements)) {
foreach ($elements as $element) {
$text[] = strip_tags($element->nodeValue);
}
}
print_r($text); // print out all the strings
This is tested and working. You can read more about the PHP's DOMDocument class here: http://www.php.net/manual/en/book.dom.php
Here's a demonstration: http://phpfiddle.org/lite/code/0nv-hd6 (click 'Run')
Try this:
preg_match_all('~^(.*?)<br />$~m', $source, $matches);
Should work. Please try it
preg_match_all("/([^<>]*?)<br\s*\/?>/", $source, $matches);
or if your strings may contain some HTML code, use this one:
preg_match_all("/(.*?)<br\s*\/?>\\n/", $source, $matches);
How to remove all attributes from <a> tag except href="/index.php..." ? and add a custom class to it ?
So this:
content
Becomes:
content
i cant manage the preg_replace to work it: `
<?php
$text = 'content';
echo preg_replace("/<a([a-z][a-z0-9]*)(?:[^>]*(\shref=['\"][^'\"]['\"]))?>/i", '<$1$2$3>', $text);
?>
DOMDocument is better, but with regex
preg_replace("/<a [^>]*?(href=[^ >]+)[^>]*>/i", '<a $1 class="custom">', $text);
Assumes no space in href and no > in attributes.
You could use DomDocument:
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML('content');
$items = $doc->getElementsByTagName('a');
$href = $items->item(0)->getAttribute('href');
$value = $items->item(0)->nodeValue;
libxml_clear_errors();
echo ''.$value.'';
I have different format array of html
[amp;src]=>image, anotherone [posthtml]=>image2, anothertwo [nbsp;image3
How to extract img and text using common preg_match() by which we can get perfect image src and text from html. If it is not possible using preg_match(), is there another way to fix it.
If any one know please, reply it. How to fix it.
I need your hand.
The recommended way is to use DOM
$dom = new DOMDocument;
$dom->loadHTML($HTML);
$images = $dom->getElementsByTagName('img');
foreach($images as $im){
$attrs = $imgages->attributes();
$src = $attrs->getNamedItem('src')->nodeValue
}
Using Regular expression:
preg_match_all("/<img .*?(?=src)src=\"([^\"]+)\"/si", $html, $m);
print_r($m);
I am interesting in removing all the text within the following tags:
<p class="wp-caption-text">Remove this text</p>
Can anybody give me an idea of how this can be done in php?
Thank you very much
Get rid of the tag and content inside of it:
$content = preg_replace('/<p\sclass=\"wp\-caption\-text\">[^<]+<\/p>/i', '', $content);
or if you want to preserve the tags:
$content = preg_replace('/(<p\sclass=\"wp\-caption\-text\">)[^<]+(<\/p>)/i', '$1$2', $content);
As bit higher-level alternative to regular expressions.
You can process with DOM. You can match all nodes you're looking for with XPath //p[#class="wp-caption-text"].
For example:
$doc = new DOMDocument();
$doc->loadHTML($yourHTMLasString);
$xpath = new DOMXPath($doc);
$query = '//p[#class="wp-caption-text"]';
$entries = $xpath->query($query);
foreach ($entries as $entry) {
$entry->textContent = '';
}
echo $doc->saveHTML();
Try this:
$string = '<p class="wp-caption-text">Remove this text</p>';
$pattern = '/(.*<p .*>).*(<\/p>.*)/';
$replacement = '$1$2';
echo preg_replace($pattern, $replacement, $string);
if its always the same tag you could simply do search for the string. use the position resulting to substring from it to the closing tag.
Or you could use a regular expression, there are good ones posted here that can help you.