Syntax high lighting

[SyncViews]

How do I get php to add html tags to highlight code?

 

Some of them (like == or <=) I can just do by replaceing say '==' with '<span class="comparison">==</span>' But what of strings, varibles, reals etc?

 

eg

if (height >= 125 || width >= 125)
{
    tobig = 1;
    show_message('Item is to big');
}

need to go to:

<span class="conditional">if</span> (<span class="var">height</span> <span class="comparison"><=</span> <span class="real">125</span> <span class="logical">||</span> <span class="var">width</span> <span class="comparison">>=</span> <span class="real">125</span>)
{
    <span class="var">tobig</span> <span class="assignment">=</span> <span class="real">1</span>;
    <span class="function">show_message</span>('<span class="string">Item is to big</span>');
}

[trq]

Before you get a headache you might want to take a look at geshi or at the very least the highlight_string() function.

[SyncViews]

As I only really want something to prase one thing useing one style (useing existing css files) there must be a better way without all the bulk GeShi adds...

 

Basicly I need it to do serval passes adding tags arcording to some basic rules eg (could merge some of these but it's easyer to understand this way I think)

 

1st pass:

add comment tags to all "/* .... */" blocks

 

2nd pass:

add comment tags from "//" to the end of the line while igornaing existing comment blocks

 

3rd pass onwards - skip all code within comment blocks:

add string tage to all "..." and '...' blocks

 

4th pass onwards - skip all comments and string blocks:

replace certain items (eg "if", "else", "=", "+") with versions includeing tags

 

5th pass:

add real tags to all numbers

 

6th pass:

add tags to all functions (mayby by detecting the string(...)?)

 

7th pass:

add constant tags to all predefined constants (these constants could be stored in an array)

 

8th pass:

All remaining strings outside tags are given varible tags

[SyncViews]

Still want to know how to do this... I really would rather write my own code than work with someone elses system that has lots of stuff I do not want.

[papaface]

Theres no point in reinventing the wheel by the way.

[SyncViews]

ok...but I still need a way to make geshi or whatever only handle text within the

 block (where xxx is php or htm or whatever)