Excluding phrases from regular expression

[wapoc]

This should be simple, but I can't figure it out.

Let's say I want to check if my input does not contain the word 'hello'.

In my mind this is the equivalent of [^(hello)]+ but that obviously doesn't work.

This is for a strict parser of tags and therefore I have to exclude whole words. Am I able to do this with regular expressions, or do I have to do it manually?

Cheers,
Rob

 

[spookie]

Why not use a simple strpos() to do this..

$str = "hello" ;
$fullstr = "hello world!" ;
$pos = strpos( $fullstr, $str ) ;

if ( $pos === false  ) {
	echo "string does not contain $str word" ;
}
else {
	echo "string contains $str word" ;
}

--------------------------------------------------------------------------
I never set a goal because u never know whats going to happen tommorow.

 

[wapoc]

I need it for replacement too. It's a tag parser, and it's strict, e.g.:

text is ok
text is ok
t][t is ok
text is not
text is not

etc.

 

[wapoc]

Whoops! That'll teach me to preview.

text is ok
text is ok
t[xt is ok
text is ok

but

text is not
text is not
text is not

and so on.

 

[predamarcel]

hi,
you can try with preg_match().

if (preg_match("/your_regex/", $input_str, $matches_array)==0)
{
   // doesnt match the reg_exp

}else
{
   // the reg_exp was found
};

___

http://marcel.4x4.ro/

____

 

[vbkris]

>>text is not

what should be done when such a syntax is encountered? should the file just display the text as is or try to change it to HTML???

Known is handfull, Unknown is worldfull

 

[wapoc]

It should convert it to WML (strict HTML for mobiles), so bad syntax is not permissible.

Apologies for not being clearer!

I think my best bet may be to use the standard PHP string functions and parse it myself, but I'd still like to know if it's possible to exclude a phrase from a regular expression.

 

[DRJ478]

Have you considered HTML tidy?

http://tidy.sourceforge.net/