When this modifier is set, the "start of line" and "end of String, or before a terminating newline (unless Line" metacharacter ($) matches only at the end of the Matches only at the start of the string, while the "end of Single "line" of characters (even if it actually contains If this modifier is set, letters in the pattern match bothīy default, PCRE treats the subject string as consisting of a Spaces and newlines are ignored in modifiers, other characters cause error. In parentheses refer to internal PCRE names for these modifiers. The current possible PCRE modifiers are listed below. Matches IPv6 prefix, such as 2001:ABC0::FE31/64, but will also match 2002::fd37::91/124, make sure to use is_ip function to validate prefixes if required.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 Performs match on IPv6 addresses, for example 2001:ABC0::FE31 address, but will also match incorrect IPv6 2002::fd37::91 address as well, make sure to use is_ip function to validate IPv6 addresses. Matches IPv4 prefix, such as 192.168.0.1/24, but also will match 999.321.192.6/99, make sure to use is_ip function to validate prefixes if required. Condition check function is_ip can be used to validate IP addresses. But this pattern does not perform IP address validation, as a result this text also will be matched 321.751.123.999. This regex pattern can match IPv4 addresses, for instance 192.168.134.251. Matches any single number, such as 1 or 123 or 0012300. Line ” Loopback101 Loopback111 Vlan707” was matched by ROW regular expression.
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