shamuraq Posted August 15, 2009 Share Posted August 15, 2009 Hi all, I'm trying to replace certain characters i pulled from database using preg_replace. <? $patterns[0] = '<br />'; $replacements[0] = "\n"; echo preg_replace($patterns, $replacements, $sub);?> ?> Resulting output: Theme 1: Science and Technology< > Chapter 1 Introducing Science < > Theme 2: Measurement< > Chapter 2 Measurement and Units< > etc. What i don't understand is why there's "<" and ">" still reflected on the output? Link to comment https://forums.phpfreaks.com/topic/170447-preg_replace-confusion/ Share on other sites More sharing options...
oni-kun Posted August 15, 2009 Share Posted August 15, 2009 Your regex does not match against an expression, only a simple pattern, you can use either of these: function br2nl($text) { return preg_replace('/<br\\s*?\/??>/i', '', $text); } br2nl($sub); //Using a function echo preg_replace('/<br\\s*?\/??>/i', '', $sub); //Directly Link to comment https://forums.phpfreaks.com/topic/170447-preg_replace-confusion/#findComment-899100 Share on other sites More sharing options...
shamuraq Posted August 16, 2009 Author Share Posted August 16, 2009 Your regex does not match against an expression, only a simple pattern, you can use either of these: function br2nl($text) { return preg_replace('/<br\\s*?\/??>/i', '', $text); } br2nl($sub); //Using a function echo preg_replace('/<br\\s*?\/??>/i', '', $sub); //Directly What do u mean my regex doesn't match the expression i thought it clearly state the exact match i want to find and change them specifically. Please do explain. I'm still pretty new to PHP and any explanation that could assist my transition into a better understanding will definitely be of great help. For instance what is regex? I google it but could not understand heads or tails. Apparently there's a lot of problem with regex. Link to comment https://forums.phpfreaks.com/topic/170447-preg_replace-confusion/#findComment-899380 Share on other sites More sharing options...
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