Strip off URL parameter with PHP

Question

I have some links in a powerpoint presentation  and for some reason  when those links get clicked  it adds a return parameter to the URL  Well  that return parameter is causing my Joomla site s MVC pattern to get bungled   So  what s an efficient way to strip off this return parameter using PHP      Example  http   mydomain com index php id 115 amp Itemid 283 amp return aHR0cDovL2NvbW11bml0

User · Answer

Here is the actual code for what s described above as the  the safest  correct  method      function reduce query  uri              kill params   array  gclid          uri array   parse url  uri       if  isset  uri array  query                  Do the chopping           params   array            foreach  explode   amp     uri array  query    as  param               item   explode       param             if   in array  item 0    kill params                  params  item 0     isset  item 1      item 1                                         Sort the parameter array to maximize cache hits          ksort  params              Build new URL  no hosts  domains  or fragments involved            new uri               if   uri array  path                 new uri    uri array  path                      if  count  params   gt  0                 Wish there was a more elegant option             new uri          urldecode http build query  params                      return  new uri            return  uri       SERVER  REQUEST URI     reduce query   SERVER  REQUEST URI       However  since this will likely exist prior to the bootstrap of your application  you should probably put it into an anonymous function  Like this     call user func function  uri         kill params   array  gclid          uri array   parse url  uri       if  isset  uri array  query                  Do the chopping           params   array            foreach  explode   amp     uri array  query    as  param               item   explode       param             if   in array  item 0    kill params                  params  item 0     isset  item 1      item 1                                         Sort the parameter array to maximize cache hits          ksort  params              Build new URL  no hosts  domains  or fragments involved            new uri               if   uri array  path                 new uri    uri array  path                      if  count  params   gt  0                 Wish there was a more elegant option             new uri          urldecode http build query  params                         Update server variable            SERVER  REQUEST URI      new uri              SERVER  REQUEST URI       NOTE  Updated with urldecode   to avoid double encoding via http build query   function  NOTE  Updated with ksort   to allow params with no value without an error

User · Answer

very simple    link    http   example com index php id 115 amp Itemid 283 amp return aHR0cDovL2NvbW11bml0  echo substr  link  0  strpos  link   return   - 1     output   http   example com index php id 115 amp Itemid 283

User · Answer

function removeParam  url   param         url   preg replace     amp       preg quote  param       amp             url        url   preg replace     amp       preg quote  param       amp    amp       1    url       return  url

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The safest  correct  method would be    Parse the url into an array with parse url   Extract the query portion  decompose that into an array using parse str   Delete the query parameters you want by unset   them from the array Rebuild the original url using http build query     Quick and dirty is to use a string search replace and or regex to kill off the value

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Remove Get Parameters From Current Page  lt  php  url dir   SERVER  REQUEST URI       url dir no get param  explode  quot   quot   url dir  0    echo   SERVER  HTTP HOST    url dir no get param

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In a different thread Justin suggests that the fastest way is to use strtok      url   strtok  url          See his full answer with speed tests as well here  https   stackoverflow com a 1251650 452515

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This is to complement Marc B s answer with an example  while it may look quite long  it s a safe way to remove a parameter  In this example we remove page number   lt  php  x    http   url com search  location london amp page number 1     parsed   parse url  x    query    parsed  query     parse str  query   params    unset  params  page number      string   http build query  params   var dump  string

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Procedural Implementation of Marc B s Answer after refining Sergey Telshevsky s Answer   function strip param from url   url   param          base url   strtok  url                        Get the base url      parsed url   parse url  url                   Parse it       query    parsed url  query                    Get the query string     parse str   query   parameters                 Convert Parameters into array     unset   parameters  param                      Delete the one you want      new query   http build query  parameters      Rebuilt query string     return  base url      new query                Finally url is ready       Usage echo strip param from url   http   url com search  location london amp page number 1    location

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function remove attribute  url  attribute          url explode      url        new parameters false      if isset  url 1                   params explode   amp    url 1             new parameters ra  params  attribute              construct parameters   new parameters  amp  amp   new parameters               new parameters          return  new url  url 0   construct parameters      function ra  params  attr           attr  attr               new params array             for  i 0  i lt count  params   i                              pos strpos  params  i   attr                if  pos   false               new params    params  i                      if count  new params  gt 0          return implode   amp    new params           else          return false              just copy the above code and  just call this function like this to get new url without particular parameter   echo remove attribute  url  delete params       gives new url without that parameter

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Wow  there are a lot of examples here   I am providing one that does some error handling   It rebuilds and returns the entire URL with the query-string-param-to-be-removed  removed   It also provides a bonus function that builds the current URL on the fly   Tested  works   Credit to Mark B for the steps   This is a complete solution to tpow s  strip off this return parameter  original question -- might be handy for beginners  trying to avoid PHP gotchas   -    lt  php  function currenturl without queryparam   queryparamkey          current url   current url         parsed url   parse url   current url        if  array key exists   query    parsed url               query portion    parsed url  query          else           return  current url             parse str   query portion   query array         if  array key exists   queryparamkey    query array               unset   query array  queryparamkey              q     count   query array       0                       return  parsed url  scheme              parsed url  host      parsed url  path      q   http build query   query array          else           return  current url           function current url          current url    http     isset   SERVER  HTTPS       s                      SERVER  HTTP HOST      SERVER  REQUEST URI          return  current url     echo currenturl without queryparam   key        gt

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parse str  queryString   vars   unset  vars  return      queryString   http build query  vars     parse str parses a query string  http build query creates a query string

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MarcB mentioned that it is dirty to use regex to remove an url parameter  And yes it is  because it s not as easy as it looks    urls   array     example com  foo bar      example com  bar foo amp foo bar      example com  foo bar amp bar foo       echo  Original    PHP EOL  foreach   urls as  url      echo  url   PHP EOL     echo PHP EOL     AaronHathaway    PHP EOL  foreach   urls as  url      echo preg replace    amp  foo    amp       null   url    PHP EOL     echo PHP EOL     SergeS    PHP EOL  foreach   urls as  url      echo preg replace     amp  2        amp    preg replace    foo    amp            url     PHP EOL     echo PHP EOL     Justin    PHP EOL  foreach   urls as  url      echo preg replace       amp   foo    amp     amp          1    url    PHP EOL     echo PHP EOL     kraftb    PHP EOL  foreach   urls as  url      echo preg replace     amp     foo    amp    amp       1   preg replace     amp     foo    amp             url     PHP EOL     echo PHP EOL    My version    PHP EOL  foreach   urls as  url      echo str replace    amp          preg replace     amp   foo    amp       null   url     PHP EOL      returns    Original example com  foo bar example com  bar foo foo bar example com  foo bar bar foo   AaronHathaway example com   example com  bar foo example com   bar foo   SergeS example com   example com  bar foo  example com   bar foo   Justin example com   example com  bar foo  example com  bar foo   kraftb example com  example com  bar foo example com  bar foo  My version example com  example com  bar foo example com  bar foo   As you can see only  kraftb posted a correct answer using regex and my version is a little bit smaller

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You could do a preg replace like    new url   preg replace    amp  return    amp            old url

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This should do it   public function removeQueryParam string  url  string  param   string        parsedUrl   parse url  url        if  isset  parsedUrl  param               baseUrl   strtok  url                parse str parse url  url   query     query           unset  query  param            return sprintf   s  s                baseUrl              http build query  query                        return  url

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This one of many ways  not tested  but should work     link    http   mydomain com index php id 115 amp Itemid 283 amp return aHR0cDovL2NvbW11bml0    linkParts   explode   amp return     link    link    linkParts 0

User · Answer

lt   if isset   GET  i     unset   GET  i     header  location         gt    This will remove the  i  parameter from the URL  Change the  i s to whatever you need

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var   preg replace    return               var      var   preg replace      2            var      Second line will just replace  amp  amp  to  amp

[php] Strip off URL parameter with PHP

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