12/29/2023 0 Comments Find complete words with grep regexI am posting it here in hopes that others may find it useful and for later reference. I search for a little while and could not find anything to strip the links from the tags so I generated my own little snippet. The only issue I ran into, for my needs, were that the anchors would not keep their links. I have been working on a email system that will automatically generate a text email from a given HTML email by using strip_tags(). Only about a 2/3rd of the time instead of 1/6th ![]() With long words ('averylongwordtospitepreg'), the difference is only much less. (for 12 words, 100,000 iterations, no word found) With efficient programming, the foreach is ONLY faster when the first word in the ban-list is found. ![]() Because in the other cases, you would need to do a foreach for each word. When using a 'bad words reject string' filter, preg_match is MUCH faster than strpos / stripos. So, if preg_match results in int(0) you seem to have to check preg_last_error() if maybe an error occurred. In short, preg_match seems to return an int(0) instead of the expected boolean(false) if the regular expression could not be executed due to the PCRE recursion-limit. Here, the problem is that preg_match does not return boolean(false) as expected by the description / manual of above. On one of our Windows-Servers the above example does not crash PHP, but (directly) hits the recursion-limit. It wraps the possibly crashing preg_match call by decreasing the PCRE recursion limit in order to result in a Reg-Exp error instead of a PHP-crash. If you are looking for a work-around, the following code-snippet is what I found helpful. This seems to be a known bug (see ), but I don't know if it has been fixed, yet. On one of our Linux-Servers the above example crashes PHP-execution with a C(?) Segmentation Fault(!). In most cases, the following example will show one of two PHP-bugs discovered with preg_match depending on your PHP-version and configuration. Matching a backslash character can be confusing, because double escaping is needed in the pattern: first for PHP, second for the regex engine Not really, no.Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ![]() Re^2: grep - serach limited to complete word only "is a spot between two characters that has a \w on one side of it and a \W on the other side of it (in either order), counting the imaginary characters off the beginning and end of the string as matching a \W "Ĭan I said the word boundary is any character in class \w?(e,g, space, tab, newline?) One more question on the word boundary: I read the documentation and the document said, Thank you for all of you who reply this question. Re: grep - serach limited to complete word only Precise specification of a problem-area makes it easier for Perl Monks to provide proper answers (and standard spelling is a "good thing," too).
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