How to remove part of a string

Question

Let   s say I have test 23 and I want to remove test    How do I do that   The prefix before   can change

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When you need rule based matching  you need to use regex   string    REGISTER 11223344 here   preg match     d       string   match    number    match 1     That will match the first set of numbers  so if you need to be more specific try    string    REGISTER 11223344 here   preg match   REGISTER   d   here     string   match    number    match 1

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substr   is a built-in php function which returns part of a string  The function substr   will take a string as input  the index form where you want the string to be trimmed  and an optional parameter is the length of the substring  You can see proper documentation and example code on http   php net manual en function substr php  NOTE   index for a string starts with 0

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string    test 1234   alert string substring string indexOf      1      It even works if the string has no underscore   Try it at http   jsbin com

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The following snippet will print  REGISTER here    string    REGISTER 11223344 here     result   preg replace     array     d          array          string     print r  result     The preg replace   API usage us as given below    result   preg replace      array   pattern1      pattern2         array  replace1    replace2         input string

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Assuming your string always starts with  test     var str    test 23   alert str substring  test   length

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string    removeTHISplease   result   string replace  THIS         I think replace do the same thing like a some own function  For me this works

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Do the following   string    REGISTER 11223344 here     content   preg replace   REGISTER    here       string     This would return  REGISTERhere   or   string    REGISTER 11223344 here     content   preg replace   REGISTER      here       string     This would return  REGISTER here

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Dynamically  if you want to remove  a  part s  from  a  fixed index es  of a string  use this function          Removes index indexes from a string  using a delimiter          param string  string     param int int    index An index  or a list of indexes to be removed from string      param string  delimiter      return string     todo Note  For PHP versions lower than 7 0  remove scalar type hints  i e  the    types before each argument  and the return type      function removeFromString string  string   index  string  delimiter         string        stringParts   explode  delimiter   string           Remove indexes from string parts     if  is array  index             foreach   index as  i                unset  stringParts  int   i                     else           unset  stringParts  int   index                   Join all parts together and return it     return implode  delimiter   stringParts       For your purpose   remove from str  REGISTER 11223344 here   1      Output  REGISTER here   One of its usages is to execute command-like strings  which you know their structures

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Easiest way I think is   var s   yourString replace      g

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str replace find  replace  string  count     find Required  Specifies the value to find replace  Required  Specifies the value to replace the value in find string   Required  Specifies the string to be searched count    Optional  A variable that counts the number of replacements   As per OP example    Example string    REGISTER 11223344 here    Example string PART REMOVED   str replace  11223344        Example string       will leave you with  REGISTER  here      finally - clean up potential double spaces  beginning spaces or end spaces that may have resulted from removing the unwanted string  Example string COMPLETED   trim str replace             Example string PART REMOVED       trim   will remove any potential leading and trailing spaces - the additional  str replace    will remove any potential double spaces     will leave you with  REGISTER here

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My favourite way of doing this is  splitting and popping    var str    test 23   alert str split      pop        - gt  23  var str2    adifferenttest 153   alert str2 split      pop        - gt  153   split   splits a string  into an array of strings using a specified separator string  pop   removes the last element from an array and returns that element

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assuming 11223344 is not constant   string  REGISTER 11223344 here    s   explode      string   unset  s 1     s   implode      s   print   s n

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I wanted to remove  quot www  quot  from a href so I did this  const str    quot https   www example com path quot    str split  quot www  quot   join  quot  quot        https   example com path

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If you want to remove part of string   let str    test 23   str replace  test            23   If you want to replace part of string   let str    test 23   str replace  test     student-       student-23

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If you re specifically targetting  11223344   then use str replace      str replace  search   replace   subject  echo str replace  11223344       REGISTER 11223344 here

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You can use str replace    which is defined as   str replace  search   replace   subject    So you could write the code as    subject    REGISTER 11223344 here     search    11223344     trimmed   str replace  search       subject    echo  trimmed     If you need better matching via regular expressions you can use preg replace

[javascript] How to remove part of a string?

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