Getting checkbox values on submit

Question

I have 6 options  I want to get the checked values to store them in variable on second page  How do I go on doing that    lt form action  third php  method  get  gt       lt  -- Choices -- gt      Red      lt input type  checkbox  name  color    id  color  value  Red  gt      Green    lt input type  checkbox  name  color    id  color  value  Green  gt      Blue     lt input type  checkbox  name  color    id  color  value  Blue  gt      Cyan     lt input type  checkbox  name  color    id  color  value  Cyan  gt      Magenta  lt input type  checkbox  name  color    id  color  value  Magenta  gt      Yellow   lt input type  checkbox  name  color    id  color  value  Yellow  gt      Black    lt input type  checkbox  name  color    id  color  value  Black  gt       lt  -- Submit -- gt       lt input type  submit  value  submit  gt   lt  form gt    And third php page     color     GET  color     echo  The color is    color    If I remove     I get the color is on  when I do it like color   I get a notice saying        Array to string conversion   What I want is the value of checked  checkboxes so I can store it in variable

User · Accepted Answer

A good method which is a favorite of mine and for many I'm sure, is to make use of foreach which will output each color you chose, and appear on screen one underneath each other.

When it comes to using checkboxes, you kind of do not have a choice but to use foreach, and that's why you only get one value returned from your array.

Here is an example using $_GET. You can however use $_POST and would need to make both directives match in both files in order to work properly.

###HTML FORM

<form action="third.php" method="get">
    Red<input type="checkbox" name="color[]" value="red">
    Green<input type="checkbox" name="color[]" value="green">
    Blue<input type="checkbox" name="color[]" value="blue">
    Cyan<input type="checkbox" name="color[]" value="cyan">
    Magenta<input type="checkbox" name="color[]" value="Magenta">
    Yellow<input type="checkbox" name="color[]" value="yellow">
    Black<input type="checkbox" name="color[]" value="black">
    <input type="submit" value="submit">
</form>

###PHP (using $_GET) using third.php as your handler

<?php

$name = $_GET['color'];

// optional
// echo "You chose the following color(s): <br>";

foreach ($name as $color){ 
    echo $color."<br />";
}

?>

Assuming having chosen red, green, blue and cyan as colors, will appear like this:

red
green
blue
cyan

##OPTION #2

You can also check if a color was chosen. If none are chosen, then a seperate message will appear.

<?php

$name = $_GET['color'];

if (isset($_GET['color'])) {
    echo "You chose the following color(s): <br>";

    foreach ($name as $color){
        echo $color."<br />";
    }
} else {
    echo "You did not choose a color.";
}

?>

##Additional options: To appear as a list: (<ul></ul> can be replaced by <ol></ol>)

<?php

$name = $_GET['color'];

if (isset($_GET['color'])) {
    echo "You chose the following color(s): <br>";
    echo "<ul>";
    foreach ($name as $color){
        echo "<li>" .$color."</li>";
    }
    echo "</ul>";
} else {
    echo "You did not choose a color.";
}

?>

User · Answer

It s very simple   The checkbox field is like an input text  If you don t write anything in the field  it will say the field doesn t exist    lt form method  post  gt       lt input type  checkbox  name  check  gt This is how it works  lt br gt       lt button type  submit  name  submit  gt Submit lt  button gt   lt  form gt   lt  php if isset   POST  submit           if  isset   POST  check               echo  Not selected         else          echo  Selected              gt

User · Answer

foreach is the best way to get array of values   here the example code  html code    lt form action  send php  method  post  gt      Red lt input type  checkbox  name  color    id  color  value  red  gt      Green lt input type  checkbox  name  color    id  color  value  green  gt      Blue lt input type  checkbox  name  color    id  color  value  blue  gt      Cyan lt input type  checkbox  name  color    id  color  value  cyan  gt      Magenta lt input type  checkbox  name  color    id  color  value  Magenta  gt      Yellow lt input type  checkbox  name  color    id  color  value  yellow  gt      Black lt input type  checkbox  name  color    id  color  value  black  gt       lt input type  submit  value  submit  gt   lt  form gt    phpcode    lt  php   name    POST  color       foreach   name as  color        echo  color   lt br   gt         gt

User · Answer

Just for printing you can use as below     print r   GET  color       or  var dump   GET  color

User · Answer

What i suggest is   its better to use post than get  here are some difference between post VS get  Some notes on GET requests    GET requests can be cached GET requests remain in the browser history GET requests can be bookmarked GET requests should never be used when dealing with sensitive data GET requests have length restrictions GET requests should be used only to retrieve data   Some notes on POST requests    POST requests are never cached POST requests do not remain in the browser history POST requests cannot be bookmarked POST requests have no restrictions on data length   HTML  Code               lt html gt       lt head gt  lt  head gt       lt body gt       lt form action  output php  method  post  gt      Red lt input type  checkbox  name  color    id  color  value  red  gt      Green lt input type  checkbox  name  color    id  color  value  green  gt      Blue lt input type  checkbox  name  color    id  color  value  blue  gt      Cyan lt input type  checkbox  name  color    id  color  value  cyan  gt      Magenta lt input type  checkbox  name  color    id  color  value  Magenta  gt      Yellow lt input type  checkbox  name  color    id  color  value  yellow  gt      Black lt input type  checkbox  name  color    id  color  value  black  gt       lt input type  submit  value  submit  gt       lt  form gt       lt body gt       lt  html gt    PHP code       lt  php       if isset   POST  color            name     POST  color         echo  You chose the following color s    lt br gt        foreach   name as  color       echo  color   lt br   gt              end brace for if isset      else        echo  You did not choose a color                  gt

User · Answer

I think the value for the   POST  color   should be read only after checking if its set    lt  php       if isset   POST  color              name     POST  color           echo  You chose the following color s    lt br gt        foreach   name as  color      echo  color   lt br   gt            end brace for if isset  else    echo  You did not choose a color          gt

User · Answer

retrive check box and gender value  gender  row  gender     chkhobby  row  chkhobby     lt tr gt       lt th gt GENDER lt  th gt       lt td gt              Male lt input type  radio  name  gender  value  1   lt  php echo   gender    1       checked            gt   gt              Female lt input type  radio  name  gender  value  0   lt  php echo   gender    0       checked            gt   gt        lt  td gt   lt  tr gt   lt tr gt       lt th gt Hobbies lt  th gt       lt td gt           lt pre gt  lt  php   print r  row                 hby    explode      row  chkhobby                   print r  hby             gt  lt  pre gt          read lt input id  check 1  type  checkbox  name  chkhobby    value  read   lt  php if in array  read   hby     gt  checked  checked  lt  php    gt  gt          write lt input id  check 2  type  checkbox  name  chkhobby    value  write   lt  php if in array  write   hby     gt  checked  checked  lt  php    gt  gt          play lt input id  check 4  type  checkbox  name  chkhobby    value  play   lt  php if in array  play   hby     gt  checked  checked  lt  php    gt  gt         lt  td gt       lt  tr gt    update  gender   POST  gender     chkhobby   implode        POST  chkhobby

User · Answer

If you want to turn specific values in to new variables if they have been selected      Retrieve array color   and set as variable      colors     GET  color       Use array search to find the key for  red   key red   array search  red    colors      If  red  exists  the key will be an integer  or FALSE  if  is int  key red          red color    Red was selected

User · Answer

It s not action  get  or action  post  it s method  get  or method  post   Try to do it using post method    lt form action  third php  method  POST  gt      Red lt input type  checkbox  name  color    id  color  value  red  gt      Green lt input type  checkbox  name  color    id  color  value  green  gt      Blue lt input type  checkbox  name  color    id  color  value  blue  gt      Cyan lt input type  checkbox  name  color    id  color  value  cyan  gt      Magenta lt input type  checkbox  name  color    id  color  value  Magenta  gt      Yellow lt input type  checkbox  name  color    id  color  value  yellow  gt      Black lt input type  checkbox  name  color    id  color  value  black  gt       lt input type  submit  value  submit  gt   lt  form gt    and in third php       or for a pericular field you colud get value in     POST  color   0    for RED   POST  color   1     for GREEN

User · Answer

Perhaps a better way is using the php function in array   like this    style  V    can be  V ertical or  H orizontal  lineBreak   style   V     lt br gt        name  colors    the name of your options  Legent  Select your  name    dress it up in a nice fieldset with a ledgent  options array  red   green   blue   orange   yellow   white   black     boxes      innitiate the list of tickboxes to be generated if isset   REQUEST   name         we shall use   REQUEST but   POST would be better     Checked   REQUEST   name     else      Checked array      foreach  options as  option    checkmark  in array  option  Checked    checked       nameAsArray  name        we would like the returned data to be in an array so we end with     boxes    style   V     lt span class  label2  align  right  gt  lt b gt  option    lt  b gt  lt  span gt     lt b gt  option  lt  b gt     boxes    lt input style  width 2em   type  checkbox  name   nameAsArray  id   option  value   option   checkmark  gt  lineBreak      echo lt  lt  lt EOF  lt html gt   lt head gt  lt  head gt   lt body gt   lt form name  Update  method  GET  action     SERVER  PHP SELF     gt  n  lt fieldset id  tickboxes  style  width 25em   gt   lt legend gt   Legent  lt  legend gt    boxes   lt  fieldset gt   lt button type  submit   gt Submit Form lt  button gt   lt  form gt   lt body gt   lt  html gt  EOF     To start with we have created a variable  style to set if we want the options in a horizontal or vertical way  This will infrequence how we display our checkboxes  Next we set the  name for our options  this is needed as a name of the array where we want to keep our options  I have created a loop here to construct each option as given in the array  options  then we check each item if it should be checked in our returned form  I believe this should simplify the way we can reproduce a form with checkboxes

[php] Getting checkbox values on submit

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