[lp_regexp_encode]

Description

Returns regexp hex-encoded text.  Use to avoid passing special regexp chars into the regexp engine.

Requires [lp_string_ucs]

Sample Usage

'
';
var:'search' = (:'ä','dog','++','\\','$');

var:'text' = 'This is a test $string with special regexp ä characters \\dog test. ++';

'Text   = ' $text '

';
iterate: $search, local:'s';
var:'encode' = lp_regexp_encode: #s;
'-' * 60 '\r\n';
'Search = ' #s '\r\n';
'Encode = ' $encode '\r\n';
'Found  = ' (string_findregexp: $text, -find=$encode, -ignorecase) '\r\n';
/iterate;
'
';

Source Code

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[

define_tag:'lp_regexp_encode',
	-description='Returns regexp hex-encoded text.',
	-priority='replace',
	-required='text';
	
	// use to avoid passing special regexp chars into the regexp engine
	// http://www.pcre.org/pcre.txt

	local:'return' = string;

	// encode regexp chars		
	iterate: #text, local:'char';
		#return += '\\x{' (lp_string_ucs: #char, -hex) '}';
	/iterate;		

	return: @#return;

/define_tag;
	
]

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