about preg_match_all statement

[swethak]

hi,

i write the below code to capture the images from the website when i submit the url.In the same way i want to capture the Text information from the website.plz tell that whats the code for that.plz help me.


[php]

<?php

$content= file_get_conten ts($url);
preg_match_all( "/<img(.*)src=(\" |')(.*)(\"|\')( .*)[\/]?>/siU", $content, $match, PREG_PATTERN_OR DER);

echo "<b>Capture Images :</b><br>";
echo "<br>";
print_r($match[0]);
echo "<br>";
echo "<br>";
echo "<b>Capture Images URLS :</b><br><br>";
preg_match_all( "/<img(.*)src=(\" |')(.*)(\"|\')( .*)[\/]?>/siU", $content, $match, PREG_PATTERN_OR DER);
print_r($match[3]);
[/php]

[pbmods]

Heya, Swethak.

What is your code doing now that is different from what you want it to do?

[swethak]

Heya, Swethak.

What is your code doing now that is different from what you want it to do?

It is for capture the images from website. i Want capture the text information from website.

[Gulzor]

If you are working with PHP5, you can use the DOM API for that.

Adapt this to your needs :
[php]
<?php
$htmlString = file_get_conten ts('url_or_path _to_html_file') ;
$htmlDoc = DOMDocument::lo adHTML($htmlStr ing);
$xpath = new DOMXPath($htmlD oc);

/* fetch the content of all <p> tags */
$pNodesList = $xpath->query('//p');
for ($i=0; $i<$pNodesList->length; $i++) {
$pNode = $pNodesList->item($i);
echo $pNode->nodeValue, "\n";
}

?>
[/php]

May not be the best method but I prefer handling HTML document with the DOM API instead of knocking my head on the walls with regex :P

[swethak]

If you are working with PHP5, you can use the DOM API for that.

Adapt this to your needs :
[php]
<?php
$htmlString = file_get_conten ts('url_or_path _to_html_file') ;
$htmlDoc = DOMDocument::lo adHTML($htmlStr ing);
$xpath = new DOMXPath($htmlD oc);

/* fetch the content of all <p> tags */
$pNodesList = $xpath->query('//p');
for ($i=0; $i<$pNodesList->length; $i++) {
$pNode = $pNodesList->item($i);
echo $pNode->nodeValue, "\n";
}

?>
[/php]

May not be the best method but I prefer handling HTML document with the DOM API instead of knocking my head on the walls with regex :P

I used like that way i got below errors.plz tell that whats the mistake.

Warning: DOMDocument::lo adHTML() [function.DOMDoc ument-loadHTML]: htmlParseEntity Ref: expecting ';' in Entity, line: 34 in C:\wamp\www\tes t\textdata.php on line 3

Warning: DOMDocument::lo adHTML() [function.DOMDoc ument-loadHTML]: htmlParseEntity Ref: expecting ';' in Entity, line: 34 in C:\wamp\www\tes t\textdata.php on line 3

Warning: DOMDocument::lo adHTML() [function.DOMDoc ument-loadHTML]: htmlParseEntity Ref: expecting ';' in Entity, line: 34 in C:\wamp\www\tes t\textdata.php on line 3

Warning: DOMDocument::lo adHTML() [function.DOMDoc ument-loadHTML]: htmlParseEntity Ref: expecting ';' in Entity, line: 34 in C:\wamp\www\tes t\textdata.php on line 3

[Gulzor]

These are "just" warnings resulting in wrong or unsupported html entities or something else. It's just impossible to parse a html document without getting these warnings...

If your texts are not between <p></p>, you can replace //p by //td. Like I said, you need to adapt it to your needs.

[swethak]

These are "just" warnings resulting in wrong or unsupported html entities or something else. It's just impossible to parse a html document without getting these warnings...

If your texts are not between <p></p>, you can replace //p by //td. Like I said, you need to adapt it to your needs.

If i use the condition as if the data is in between <p> tags it shows the data otherwise it didn't give any error.How i use the condition for that .Plz help me.

[Gulzor]

If i use the condition as if the data is in between <p> tags it shows the data otherwise it didn't give any error.How i use the condition for that .Plz help me.

I don't understand what your problem is now... not only <p> tag hold texts. <li>, <td>, <span> and more also do.

[mobs]

Say that I just wanted to retrieve the number 30735 from the following code, how would you go about doing that?

<a href="/?item=30735">River Runner</a>

[pbmods]

Heya, Mobs. Welcome to Bytes!

The only part that we really care about is:

<a href="/?item=30735

Now, we have to make a couple of assumptions:

• The URL might have a path and/or other query variables prepended. E.g.:
  

  <a href="/path/to/some.php?file=test&item=123456"

• The URL might have some stuff after it. E.g.,:
  

  <a href="/?item=654321&amp;visitor=1"

• The anchor tag might have attributes before the href attribute. E.g.,:
  

  <a target="_blank" href="/?item=13579"

We are going to assume that the tag is well-formed (ends with a '>' and the href attribute is properly-quoted with any quotes inside of it percent- or ampersand-escaped).

With that in mind, we need to be able to skip over anything we don't care about and focus only on what we want:

/<a[^>]*href="[^"]+item=(\d+)/
 

This should be enough to harvest item IDs from anchor tags on the page.