At 05:30 PM 4/23/2006, Pham Huu Le Quoc Phuc wrote:
I want to get src of image form a $text, I have a below text
$Text = <table border="1" cellpadding="3%" cellspacing="3%" width="100%">
<tr> <td width="20%">
<img align="middle" border="0" id=userupload/78/Autumn.jpg
src=userupload/78/Autumn.jpg onClick="javascript:ViewImage(this.id);"
width="100" height="100" >
</td>
<td></td></tr> </table>
</td>
<td class="frame2_middle_right"></td>
</tr>
<tr>
<td class="frame2_bottom_left"></td>
<td class="frame2_bottom_center">
</td>
Pham,
Before you do anything else, fix your HTML syntax which is full of
errors. Your </table> tag appears in the middle of the table and
your id syntax is invalid:
id=userupload/78/Autumn.jpg
The specification for id [1] says it's an element of type 'name' [2]:
<quote>
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be
followed by any number of letters, digits ([0-9]), hyphens ("-"),
underscores ("_"), colons (":"), and periods (".").
</quote>
In other words, you can't have slashes in your id.
Put your HTML through the W3C markup validator before trying to write
script that parses it:
http://validator.w3.org/
When you're ready, you can locate an image src using a Regular
Expression such as this:
/<img\s+[^>]*src=\"([^"])*[^>]*>\"/
which means:
<img\s+ = <img followed by one or more whitespace characters
[^>]* = zero or more characters not including a close-bracket
src=\" = src="
([^"])* = zero or more characters not including a close-quote
(THIS IS YOUR SRC VALUE)
\" = close-quote
[^>]* = any number of characters excluding close-bracket
> = close-bracket
The src attribute value will be captured by $aMatches[1] by the logic:
$sRegExp = <<< hdRE
/<img\s+[^>]*src=\"([^"])*[^>]*>\"/
hdRE;
preg_match($sRegExp, $sText, $aMatches);
This RegExp is designed to confine its result to a single HTML IMG tag.
Documentation on PHP regular expression processing begins here:
http://php.net/pcre
Regards,
Paul
[1] specification for 'id':
http://www.w3.org/TR/html4/struct/global.html#adef-id
[2] element type 'name': http://www.w3.org/TR/html4/types.html#type-name
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