Get URL query string parameters

Question

What is the  less code needed  way to get parameters from a URL query string which is formatted like the following      www mysite com category subcategory myqueryhash   Output should be  myqueryhash  I am aware of this approach   www mysite com category subcategory q myquery   lt  php    echo   GET  q       Output  myquery   gt

User · Answer

The function parse str   automatically reads all query parameters into an array    For example  if the URL is http   www example com page php x 100 amp y 200  the code   queries   array    parse str   SERVER  QUERY STRING     queries     will store parameters into the  queries array   queries  x   100   queries  y   200    Look at documentation of parse str    EDIT  According to the PHP documentation  parse str   should only be used with a second parameter  Using parse str   SERVER  QUERY STRING    on this URL will create variables  x and  y  which makes the code vulnerable to attacks such as http   www example com page php authenticated 1

User · Answer

Thanks to  K  Shahzad This helps when you want the rewrited query string without any rewrite additions  Let say you rewrite the  test  x y to index php q test amp x y and you want only want the query string   function get query string          arr   explode       SERVER  REQUEST URI         if  count  arr     2           return          else          return     end  arr    lt br gt                    query string   get query string

User · Answer

This code and notation is not mine  Evan K solves a multi value same name query with a custom function    is taken from  http   php net manual en function parse-str php 76792 Credits go to Evan K  It bears mentioning that the parse str builtin does NOT process a query string in the CGI standard way  when it comes to duplicate fields   If multiple fields of the same name exist in a query string  every other web processing language would read them into an array  but PHP silently overwrites them   lt  php   silently fails to handle multiple values parse str  foo 1 amp foo 2 amp foo 3       the above produces   foo   array  foo    gt   3      gt   Instead  PHP uses a non-standards compliant practice of including brackets in fieldnames to achieve the same effect   lt  php   bizarre php-specific behavior parse str  foo   1 amp foo   2 amp foo   3       the above produces   foo   array  foo    gt  array  1    2    3        gt   This can be confusing for anyone who s used to the CGI standard  so keep it in mind   As an alternative  I use a  quot proper quot  querystring parser function   lt  php function proper parse str  str        result array    arr   array         split on outer delimiter    pairs   explode   amp     str        loop through each pair   foreach   pairs as  i          split into name and value     list  name  value    explode       i  2              if name already exists     if  isset  arr  name               stick multiple values into an array       if  is array  arr  name                arr  name       value                else            arr  name    array  arr  name    value                       otherwise  simply stick it in a scalar     else          arr  name     value                 return result array   return  arr      query   proper parse str   SERVER  QUERY STRING       gt

User · Answer

The PHP way to do it is using the function parse url  which parses a URL and return its components  Including the query string   Example    url    www mysite com category subcategory myqueryhash   echo parse url  url  PHP URL QUERY     output  myqueryhash    Full documentation here

User · Answer

Programming Language  PHP     Inintialize URL to the variable   url    https   www youtube com watch v qnMxsGeDz90        Use parse url   function to parse the URL     and return an associative array which     contains its various components   url components   parse url  url        Use parse str   function to parse the     string passed via URL  parse str  url components  query     params        Display result  echo  v parameter value is    params  v      This worked for me  I hope  it will also help you

User · Answer

I will recommended best answer as    lt  php echo  Hello     htmlspecialchars   GET  name             gt   Assuming the user entered http   example com  name Hannes  The above example will output   Hello Hannes

User · Answer

SERVER  QUERY STRING   contains the data that you are looking for     DOCUMENTATION   php net     SERVER - Manual

User · Answer

Also if you are looking for current file name along with the query string  you will just need following   basename   SERVER  REQUEST URI      It would provide you info like following example     file php arg1 val amp arg2 val   And if you also want full path of file as well starting from root  e g   folder folder2 file php arg1 val amp arg2 val then just remove basename   function and just use fillowing    SERVER  REQUEST URI

User · Answer

If you want the whole query string     SERVER  QUERY STRING

User · Answer

For getting each node in the URI  you can use function explode   to   SERVER  REQUEST URI     If you want to get strings without knowing if it is passed or not  you may use the function I defined myself to get query parameters from   REQUEST  as it works both for POST and GET params    function getv  key   default        data type              param    isset   REQUEST  key       REQUEST  key     default        if   is array  param   amp  amp   data type     int              param   intval  param              return  param      There might be some cases when we want to get query parameters converted into Integer type  so I added the third parameter to this function

User · Answer

Here is my function to rebuild parts of the REFERRER s query string   If the calling page already had a query string in its own URL  and you must go back to that page and want to send back some  not all  of that   GET vars  e g  a page number    Example  Referrer s query string was  foo 1 amp bar 2 amp baz 3 calling refererQueryString   foo     baz    returns foo 1 amp baz 3    function refererQueryString    var args              Return empty string if no referer or no   GET vars in referer available      if   isset   SERVER  HTTP REFERER               empty    SERVER  HTTP REFERER               empty parse url   SERVER  HTTP REFERER    PHP URL QUERY                return                  Get URL query of referer  something like  threadID 7 amp page 8        refererQueryString   parse url urldecode   SERVER  HTTP REFERER     PHP URL QUERY          Which values do you want to extract   You passed their names as variables        args   func get args           Get   key name   strings out of referer s URL       pairs   explode   amp    refererQueryString          String you will return later       return              Analyze retrieved strings and look for the ones of interest      foreach   pairs as  pair             keyVal   explode      pair            key    amp  keyVal 0            val   urlencode  keyVal 1              If you passed the name as arg  attach current pair to return string          if in array  key  args                  return      amp     key         val                         Here are your returned  key value  pairs glued together with   amp        return ltrim  return   amp          If your referer was  page php foo 1 amp bar 2 amp baz 3    and you want to header   back to  page php foo 1 amp baz 3     no  bar   only foo and baz   then apply   header  Location  page php   refererQueryString  foo   baz

[php] Get URL query string parameters

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