Passing arrays as url parameter

Question

What is the best way that I can pass an array as a url parameter  I was thinking if this is possible     aValues   array      url    http   www example com aParam    aValues    or how about this    url    http   www example com aParam      aValues    Ive read examples  but I find it messy    url    http   www example com aParam   value1 amp aParam   value2 amp aParam   value3

User · Answer

Easiest way would be to use the serialize function   It serializes any variable for storage or transfer  You can read about it in the php manual - serialize  The variable can be restored by using unserialize  So in the passing to the URL you use    url   urlencode serialize  array    and to restore the variable you use   var   unserialize urldecode   GET  array      Be careful here though  The maximum size of a GET request is limited to 4k  which you can easily exceed by passing arrays in a URL   Also  its really not quite the safest way to pass data  You should probably look into using sessions instead

User · Answer

lt  php  array  a      Thusitha    array  b      Sumanadasa    array  c      Lakmal    array  d      Nanayakkara     str   serialize  array    strenc   urlencode  str   print  str     n   print  strenc     n     gt     print  str     n    gives a 4  s 1  a  s 8  Thusitha  s 1  b  s 10  Sumanadasa  s 1  c  s 6  Lakmal  s 1  d  s 11  Nanayakkara    and  print  strenc     n    gives  a 3A4 3A 7Bs 3A1 3A 22a 22 3Bs 3A8 3A 22Thusitha 22 3Bs 3A1 3A 22b 22 3Bs 3A10 3A 22Sumanadasa 22 3Bs 3A1 3A 22c 22 3Bs 3A6 3A 22Lakmal 22 3Bs 3A1 3A 22d 22 3Bs 3A11 3A 22Nanayakkara 22 3B 7D   So if you want to pass this  array through URL to page no 2 php    ex -    url   http   page no 2 php data    strenc       To return back to the original array  it needs to be urldecode    then unserialize    like this in page no 2 php         lt  php      strenc2    GET  data         arr   unserialize urldecode  strenc2        var dump  arr         gt    gives    array 4        a    gt    string 8   Thusitha      b    gt    string 10   Sumanadasa      c    gt    string 6   Lakmal      d    gt    string 11   Nanayakkara      again  D

User · Answer

in create url page     data   array           car    gt   Suzuki            Model    gt   1976              query   http build query array  myArray    gt   data     url urlencode  query     echo   lt p gt  lt a href   index2 php data    url     gt  Send  lt  a gt  lt br   gt   lt  p gt       in received page    parse str   GET  data     echo  myArray  car    echo   lt br  gt    echo  myArray  model

User · Answer

I do this with serialized data base64 encoded  Best and smallest way  i guess  urlencode is to much wasting space and you have only 4k    why  http   mizine de html array-ueber-get-url-parameter-uebergeben  how  https   gist github com vdite 79919fa33a3e4fbf505c

User · Answer

This is another way of solving this problem   data   array                1                4                a    gt   b                 c    gt   d                    query   http build query array  aParam    gt   data

User · Answer

Edit  Don t miss Stefan s solution above  which uses the very handy http build query   function  https   stackoverflow com a 1764199 179125  knittl is right on about escaping  However  there s a simpler way to do this    url    http   example com index php     url     aValues       implode   amp amp aValues      array map  urlencode    aValues      If you want to do this with an associative array  try this instead   PHP 5 3   lambda function    url    http   example com index php     url    implode   amp amp    array map function  key   val        return  aValues     urlencode  key           urlencode  val          array keys  aValues    aValues       PHP  lt 5 3  callback   function urlify  key   val      return  aValues     urlencode  key           urlencode  val       url    http   example com index php     url    implode   amp amp    array map  urlify   array keys  aValues    aValues

User · Answer

There is a very simple solution  http build query    It takes your query parameters as an associative array    data   array      1      4       a    gt   b        c    gt   d      query   http build query array  aParam    gt   data      will return  string 63   aParam 5B0 5D 1 amp aParam 5B1 5D 4 amp aParam 5Ba 5D b amp aParam 5Bc 5D d    http build query   handles all the necessary escaping for you   5B      and  5D        so this string is equal to aParam 0  1 amp aParam 1  4 amp aParam a  b amp aParam c  d

User · Answer

in the received page you can use    parse str  str   array   var dump  array

User · Answer

please escape your variables when outputting  urlencode    and you can   t just print an array  you have to build your url using a loop in some way   url    http   example com index php    first   true  foreach  aValues as  key   gt   value      if   first   url      amp amp     else  first   false     url     aValues   urlencode  key       urlencode  value

User · Answer

This isn t a direct answer as this has already been answered  but everyone was talking about sending the data  but nobody really said what you do when it gets there  and it took me a good half an hour to work it out  So I thought I would help out here   I will repeat this bit   data   array   cat    gt   moggy    dog    gt   mutt      query   http build query array  mydata    gt   data     query urlencode  query     Obviously you would format it better than this www someurl com x  query  And to get the data back  parse str   GET  x     echo  mydata  dog    echo  mydata  cat

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