Vim, Cygwin, MySQL & Zsh Tips by zzapper » regex http://zzapper.co.uk Wed, 18 Jan 2012 23:15:31 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Perl: Regexp to filter out/match just the price/floating point number ie digits and dots http://zzapper.co.uk/perl-regexp-to-filter-outmatch-just-the-pricefloating-point-number-ie-digits-and-dots/ http://zzapper.co.uk/perl-regexp-to-filter-outmatch-just-the-pricefloating-point-number-ie-digits-and-dots/#comments Thu, 15 Apr 2010 11:05:59 +0000 admin http://zzapper.co.uk/perl-regexp-to-filter-outmatch-just-the-pricefloating-pint-number-ie-digits-and-dots/ There are two ways:-

$price=~tr/0-9.//cd; # delete anything but 0-9 and a real dot

$row_array[6]=~s/[^0-9.]//g; # clean up price, remove pound/dollar sign etc

]]> http://zzapper.co.uk/perl-regexp-to-filter-outmatch-just-the-pricefloating-point-number-ie-digits-and-dots/feed/ 0 Parsing HTML with preg_match http://zzapper.co.uk/parsing-html-with-preg_match/ http://zzapper.co.uk/parsing-html-with-preg_match/#comments Thu, 08 Apr 2010 20:46:43 +0000 admin http://zzapper.co.uk/?p=97 .+?</b>#i’, $html, $matches); // ? means non-greedy and is absolutely critical $match[1], $match[2] contain the results Non greedy stops the match gobbling everything between the first bold tag and the very last. I’ve never quite understood why greedy is the default behavior of RegExp (Regular Expressions) but I guess there’s a good reason for it. [...]]]> preg_match_all(‘#<b>.+?</b>#i’, $html, $matches);
// ? means non-greedy and is absolutely critical

$match[1], $match[2] contain the results

Non greedy stops the match gobbling everything between the first bold tag and the very last. I’ve never quite understood why greedy is the default behavior of RegExp (Regular Expressions) but I guess there’s a good reason for it.

PHP also has the very useful strip_tags function.

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