String indexing and preg_match
This is a discussion on String indexing and preg_match within the PHP Language forums, part of the PHP Programming Forums category; Quick-Fix: Can preg_match_all return the indexes of where it matched the string? More Detail: Read carefully: I'd like ...
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06-25-2004
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String indexing and preg_match
Quick-Fix: Can preg_match_all return the indexes of where it matched the
string? More Detail: Read carefully: I'd like to seperate a string's parts into two (2) arrays which can be subdivide themselves. Then modify them and glue them back together. I will refer to the two arrays as highlight and remnants. The method I'm using to glue the string together correctly is to store the string indexes (positions) of both the highlight and remnants parts of the string before sorting the text into arrays. ASCII Art Diagram (Mono-space text only): Original | / \ / \ / \ A B / \ / \ / \ / \ AA AB BA BB HTML entities like example: Original: The <html> rain </html> *in* Spain %d %s foo. Split: A - Highlight B - Remnants -------------------------------------- The | <html> rain | </html> *in* Spain %d %s foo. | Glued: The <html> rain </html> *in* Spain %d %s foo. Separation Code: $finds = array(); $remnants = array(); foreach ($src_array as $src) { preg_match_all($pattern, $src, $tmp); $finds = array_merge($finds, $tmp[1]); $remnants = array_merge($remnants, preg_split($pattern, $src)); } return array($finds, $remnants); I'd like to know: what would be the best way to index text directly in the separation process - to avoid duplicates being miss-indexed? For example the following function content is bogus because it can't distinguish which space character (' ') came first: $pos = 0; $l_size = 0; $list = array(); foreach($needles as $needle) { $pos = strpos($haystack, $needle, $pos+$l_size); array_push($list, array( "pos" => $pos, "raw" => $needle, "enc" => $needle)); $l_size = strlen($needle); } return $list; Accurate help much appreciated, Jens. -- Jabber ID: jtza7@jabberafrica.co.za Location: South Africa Time Zone UTC +2 
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