= 'This last line had nothing to do with any of this' Įcho replaceAnchorsWithText ( $input ). Return preg_replace_callback ( $regex, 'replaceAnchorsWithText', $data ) # if is -1 it will return the last occurrenceįunction preg_substr($pattern,$subject,$offset=0) )" # is 0 by default which returns the first occurrence, # $pattern regular expression pattern to match # return a specific sub-string in a string using # preg_substr($pattern,$subject,) function Kind of expensive, and some might say lazy but it has saved me time. Simple function to return a sub-string following the preg convention. 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. If you're wondering why all the non-capturing subpatterns (which look like this "(?:", it's so that we can do this: It's not perfect, but it should work for most non-idealists. Here's one that we use that's pretty nifty. I see a lot of people trying to put together phone regex's and struggling (hey, no worries.they're complicated). Matching a backslash character can be confusing, because double escaping is needed in the pattern: first for PHP, second for the regex engine The numbering of the nodes in simplexml starts from zero, but from 1 in DOM xpath objects Here is a function that decreases the numbers inside a string (useful to convert DOM object into simplexml object)Į.g.: decremente_chaine("somenode->anode->achildnode") will return "somenode->anode->achildnode" But couldn't able to get the actual required output.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 I'm trying to identify exact match of a string in line.
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