Regex match everything but specific pattern

Question

I need a regex able to match everything but a string starting with a specific pattern  specifically index php and what follows  like index php id 2342343

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In python    gt  gt  gt  import re  gt  gt  gt  p      index  php   0-9         gt  gt  gt  s1  index php 12345   gt  gt  gt  re match p s1   gt  gt  gt  s2  index html 12345   gt  gt  gt  re match p s2   lt  sre SRE Match object at 0xb7d65fa8 gt

User · Answer

How about not using regex      In PHP 0     strpos  string   index php

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Not a regexp expert  but I think you could use a negative lookahead from the start  e g      foo     shouldn t match anything starting with foo

User · Answer

Just match   index  php  then reject whatever matches it

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I need a regex able to match everything but except a string   starting with index php a specific pattern  specifically index php   and what follows  like index php id 2342343    Use method Exec    x000D   x000D      let match  x000D          arr       x000D          myRe       s S       index  php  id    g  x000D   x000D      var str    http   regular-viragenia index php id 2342343   x000D   x000D      while   match   myRe exec str      null    x000D           arr push match 1    x000D         x000D       x000D      console log arr   x000D   x000D   x000D     x000D   x000D  var myRe       s S       index  php  id     g  x000D  var str    http   regular-viragenia index php id 2342343   x000D  var matches array   myRe exec str   x000D  console log matches array 1    x000D   x000D   x000D    OR OTHER MATCH   x000D   x000D  let match  x000D              arr       x000D              myRe    index php  id        index   s S     g  x000D   x000D          var str    http   regular-viragenia index php id 2342343index php id 111index php id 222   x000D   x000D          while   match   myRe exec str      null    x000D               arr push match 1    x000D             x000D   x000D          console log arr   x000D   x000D   x000D

User · Answer

You can put a   in the beginning of a character set to match anything but those characters           will match everything but

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Regex  match everything but   a string starting with a specific pattern   e g  any  - empty  too - string not starting with foo    Lookahead-based solution for NFAs       foo         foo      Negated character class based solution for regex engines not supporting lookarounds        f   2     o     2   o       0 2        f   2     o     2   o      0 2     a string ending with a specific pattern  say  no world  at the end    Lookbehind-based solution      lt  world           lt  world       Lookahead solution         world             world       POSIX workaround          w   5     o   4    2   r   3    3   l   2    4   d     5         0 5       w   5     o   4    2   r   3    3   l   2    4   d     5          0 5        a string containing specific text  say  not match a string having foo   no POSIX compliant patern  sorry          foo        foo       a string containing specific character  say  avoid matching a string having a   symbol              a string equal to some string  say  not equal to foo    Lookaround-based       foo       foo        POSIX       0 2    4     f       o       o        a sequence of characters   PCRE  match any text but cat    cat  SKIP   FAIL    c     c   at   c     i or  cat  SKIP   FAIL        cat     is Other engines allowing lookarounds   cat    c     c   at   c      or   s  cat        cat      or  cat    c     c   at   c        c   at   c      c    and then check with language means  if Group 1 matched  it is not what we need  else  grab the match value if not empty   a certain single character or a set of characters   Use a negated character class    a-z    any char other than a lowercase ASCII letter  Matching any char s  but             Demo note  the newline  n is used inside negated character classes in demos to avoid match overflow to the neighboring line s   They are not necessary when testing individual strings  Anchor note  In many languages  use  A to define the unambiguous start of string  and  z  in Python  it is  Z  in JavaScript    is OK  to define the very end of the string  Dot note  In many flavors  but not POSIX  TRE  TCL     matches any char but a newline char  Make sure you use a corresponding DOTALL modifier   s in PCRE Boost  NET Python Java and  m in Ruby  for the   to match any char including a newline  Backslash note  In languages where you have to declare patterns with C strings allowing escape sequences  like  n for a newline   you need to double the backslashes escaping special characters so that the engine could treat them as literal characters  e g  in Java  world   will be declared as  quot world    quot   or use a character class   quot world    quot    Use raw string literals  Python r  bworld b    C  verbatim string literals   quot world   quot   or slashy strings regex literal notations like  world

[regex] Regex: match everything but specific pattern

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