Regex to wrap <a href=""> tag around a tag

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Regex to wrap <a href=""> tag around a tag
3 answers - 1252 bytes -
Hi,
I am trying to read the contents of a file into a string and wrap an <a
href=""tag around every <ptag and output it to the browser. This is how
far I have got:
// Get file contents
$file_contents = file_get_contents($file);
// Replace <ptags
$file_contents = preg_replace('/^<p\>[a-z][0-9]<\/p>$/', '/^<a
href="edit_paragraph&text="">\[a-z][0-9]<\/p><\/a>$/', $file_contents);
// to browser
echo $file_contents;
I have two problems.
1. - The regex doesn't work!
2. - I need to add the <ptags and all contents to the link
Here is an example
<html>
<body>
Here is a paragraph
Here is another paragraph
</body>
</html>
would become
<html>
<body>
<a href="edit_paragraph&text="Here is a paragraph">Here is a
paragraph</a>
<a href="edit_paragraph&text="Here is another paragraph">Here is
another paragraph</a>
</body>
</html>
Any advice would be greatly appreciated
No.1 | | 1838 bytes | |
The second parameter to preg_replace is the replacement string (with
optional backreferences), not another patern.

Use '/<p\>(.*)(?=<\/p>)/' for patern, '<a
href="edit_paragraph&text=$1">$1' for replacement string, however,
this does not urlencode the text parameter. You can use
preg_replace_callback instead of preg_replace to encode it in the
callback function.

This won't work for long paragraphs because the lenght of GET request is
limited. Change it to use forms instead.

Shaun wrote:
Hi,

I am trying to read the contents of a file into a string and wrap an <a
href=""tag around every <ptag and output it to the browser. This is how
far I have got:

// Get file contents
$file_contents = file_get_contents($file);
// Replace <ptags
$file_contents = preg_replace('/^<p\>[a-z][0-9]<\/p>$/', '/^<a
href="edit_paragraph&text="">\[a-z][0-9]<\/p><\/a>$/', $file_contents);
// to browser
echo $file_contents;

I have two problems.

1. - The regex doesn't work!
2. - I need to add the <ptags and all contents to the link

Here is an example

<html>
<body>
Here is a paragraph
Here is another paragraph
</body>
</html>

would become

<html>
<body>
<a href="edit_paragraph&text="Here is a paragraph">Here is a
paragraph</a>
<a href="edit_paragraph&text="Here is another paragraph">Here is
another paragraph</a>
</body>
</html>

Any advice would be greatly appreciated
No.2 | | 2661 bytes | |
Hi M,

Thanks for your help, the code works fine except if there is a line break in
the html, for example
this works

test

But this doesnt

test


Any ideas?

"M" <lists (AT) gazelasport (DOT) skwrote in message
news:438EAD90.1040601 (AT) gazelasport (DOT) sk
The second parameter to preg_replace is the replacement string (with
optional backreferences), not another patern.

Use '/<p\>(.*)(?=<\/p>)/' for patern, '<a
href="edit_paragraph&text=$1">$1' for replacement string, however, this
does not urlencode the text parameter. You can use preg_replace_callback
instead of preg_replace to encode it in the callback function.

This won't work for long paragraphs because the lenght of GET request is
limited. Change it to use forms instead.

Shaun wrote:
>Hi,
>>
>I am trying to read the contents of a file into a string and wrap an <a
>href=""tag around every <ptag and output it to the browser. This is
>how far I have got:
>>
>// Get file contents
>$file_contents = file_get_contents($file);
>// Replace <ptags
>$file_contents = preg_replace('/^<p\>[a-z][0-9]<\/p>$/', '/^<a
>href="edit_paragraph&text="">\[a-z][0-9]<\/p><\/a>$/',
>$file_contents);
>// to browser
>echo $file_contents;
>>
>I have two problems.
>>
>1. - The regex doesn't work!
>2. - I need to add the <ptags and all contents to the link
>>
>Here is an example
>>
><html>
><body>
>Here is a paragraph
>Here is another paragraph
></body>
></html>
>>
>would become
>>
><html>
><body>
><a href="edit_paragraph&text="Here is a paragraph">Here is a
>paragraph</a>
><a href="edit_paragraph&text="Here is another paragraph">Here
>is another paragraph</a>
></body>
></html>
>>
>Any advice would be greatly appreciated
No.3 | | 564 bytes | |
Shaun wrote:

>Hi M,
>
>Thanks for your help, the code works fine except if there is a line break in
>the html, for example
>this works
>
>test
>
>But this doesnt
>
>test
>
>
>Any ideas?
>

See the last user contributed note from *csaba at alum dot mit dot edu
*at ,
particularly the last paragraph. He gives a very good explanation of
pattern modifiers that answers your question.

kgt

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Archive for 'Regex to wrap <a href=""> tag around a <p> tag' by Shaun

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Regex to wrap <a href=""> tag around a <p> tag