Splitting strings in PHP and get last part

Question

I need to split a string in PHP by  -  and get the last part   So from this      abc-123-xyz-789   I expect to get       789    This is the code I ve come up with   substr strrchr  urlId   -    1    which works fine  except   If my input-string does not contain any  -   I must get the whole string  like from      123   I need to get back     123   and it needs to be as fast as possible  Any help is appreciated

User · Accepted Answer

split  pattern  string  split strings within a given pattern or regex  it s deprecated since 5 3 0   preg split  pattern  string  split strings within a given regex pattern  explode  pattern  string  split strings within a given pattern  end  arr  get last array element  So   end split  -   str    end preg split   -    str     strArray   explode  -   str   lastElement   end  strArray   Will return the last element of a - separated string     And there s a hardcore way to do this    str    1-2-3-4-5   echo substr  str  strrpos  str   -     1                         --- get the last position of  -  and add 1 if don t substr will get  -  too           ----- get the last piece of string after the last occurrence of  -

User · Answer

The accepted answer has a bug in it where it still eats the first character of the input string if the delimiter is not found   str    1-2-3-4-5   echo substr  str  strrpos  str   -     1    Produces the expected result  5  str    1-2-3-4-5   echo substr  str  strrpos  str         1    Produces -2-3-4-5  str    1-2-3-4-5   if    pos   strrpos  str            false      echo substr  str   pos   1   else     echo  str   Produces the whole string as desired  3v4l link

User · Answer

To satisfy the requirement that  it needs to be as fast as possible  I ran a benchmark against some possible solutions  Each solution had to satisfy this set of test cases    cases          aaa-zzz                        gt   zzz        zzz                            gt   zzz        -zzz                           gt   zzz        aaa-                           gt                                          gt           aaa-bbb-ccc-ddd-eee-fff-zzz    gt   zzz        Here are the solutions   function test substr  str   delimiter    -          idx   strrpos  str   delimiter       return  idx     false    str   substr  str   idx   1      function test end index  str   delimiter    -          arr   explode  delimiter   str       return  arr count  arr  - 1      function test end explode  str   delimiter    -          arr   explode  delimiter   str       return end  arr      function test end preg split  str   pattern     -           arr   preg split  pattern   str       return end  arr       Here are the results after each solution was run against the test cases 1 000 000 times   test substr                 1 706 sec test end index              2 131 sec   0 425 sec   25  test end explode            2 199 sec   0 493 sec   29  test end preg split         2 775 sec   1 069 sec   63    So turns out the fastest of these was using substr with strpos  Note that in this solution we must check strpos for false so we can return the full string  catering for the zzz case

User · Answer

This code will do that   lt  php  string    abc-123-xyz-789    output   explode  -   string   echo  output count  output -1     gt

User · Answer

You can use array pop combined with explode  Code    string    abc-123-xyz-789    output   array pop explode  -   string    echo  output    DEMO  Click here

User · Answer

As per this post   end  explode  -    string       which won t cause E STRICT warning in PHP 5  PHP magic   Although the warning will be issued in PHP 7  so adding   in front of it can be used as a workaround

User · Answer

You can do it like this    str    abc-123-xyz-789    last   array pop  explode  -    str     echo  last    echoes 789

User · Answer

As has been mentioned by others  if you don t assign the result of explode   to a variable  you get the message      E STRICT  Strict standards  Only variables should be passed by reference   The correct way is    words   explode  -    hello-world-123     id   array pop  words      123  slug   implode  -    words      hello-world

User · Answer

Just check whether or not the delimiting character exists  and either split or don t   if  strpos  potentiallyDelimitedString   -       FALSE      found delimiter  so split

User · Answer

Since explode   returns an array  you can add square brackets directly to the end of that function  if you happen to know the position of the last array item    email    name example com    provider   explode       email  1   echo  provider     example com   Or another way is list      email    name example com   list  prefix   provider    explode       email   echo  provider     example com   If you don t know the position    path    one two three four    dirs   explode       path    last dir    dirs count  dirs  - 1   echo  last dir     four

User · Answer

string    abc-123-xyz-789    exploded   explode  -    string   echo end  exploded     EDIT  Finally got around to removing the E STRICT issue

User · Answer

Just Call the following single line code    expectedString   end explode  -    orignalString

User · Answer

You can do it like this    str    abc-123-xyz-789    arr   explode  -    str    last   array pop   arr    echo  last    echoes 789

[php] Splitting strings in PHP and get last part

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