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Form

Discussion in 'PHP' started by ssimon171078, May 4, 2015.

0
  1. #1
    i wrote form in php i need when i choose county ,script prints its capital of county can you help me?
    my code is :
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>PHP form select box example</title>
<!-- define some style elements-->
<style>
label,a
{
    font-family : Arial, Helvetica, sans-serif;
    font-size : 12px;
}

</style>   
</head>

<body>
<?php
    $Capital=array("Washington","London","Paris","Mexico","Moscow","Tokyo");
    echo "now printing capitals\n";
   
    if(isset($_POST['formSubmit']))
    {
        $aCountries = $_POST['formCountries'];
       
        if(!isset($aCountries))
        {
            echo("<p>You didn't select any countries!</p>\n");
        }
        else
        {
            $nCountries = count($aCountries);
           
            echo("<p>You selected $nCountries countries: ");
            for($i=0; $i < $nCountries; $i++)
            {
                echo($aCountries[$i] . " ");
            }
            echo("</p>");
        }
    }
?>

<form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post">
    <label for='formCountries[]'>Select the countries that you have visited:</label><br>
    <select multiple="multiple" name="formCountries[]">
        <option value="US">United States</option>
        <option value="UK">United Kingdom</option>
        <option value="France">France</option>
        <option value="Mexico">Mexico</option>
        <option value="Russia">Russia</option>
        <option value="Japan">Japan</option>
    </select><br>
    <input type="submit" name="formSubmit" value="Submit" >
</form>

</body>
</html>
    PHP:

     
    ssimon171078, May 4, 2015 IP
  2. Anveto

    Anveto Well-Known Member

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    #2
    What error are you getting? You could use 
    print_r($_POST['formCountries'])
    PHP:
    to see what your array looks like when you submit. Most likely you could also replace action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" with action=""

    Have you tried name="formCountries" ?
     
    Anveto, May 4, 2015 IP
  3. freelanceDeveloper

    freelanceDeveloper Member

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    #3
    Not sure what the error is you have but I believe below might cause issues
    
$aCountries = $_POST['formCountries'];

if(!isset($aCountries))
{
    Code (markup):
    the $aCountries = $_POST['formCountries']; will throw a warning when no countries are selected and possibly the 'isset' part will always return true, as it seems to me $aCountries is always set to something (blank or null, not sure) ...

    it only returns an array of values when at least 1 value is selected...
    try
    if(!isset($_POST['formCountries']))
    Code (markup):
    or 
    if(is_empty($aCountries))
    Code (markup):

    edit : I think I understand what you mean...
    Build up your array as
    
$Capital=array("united states"=>"Washington","united kingdom"=> "London","France"=>"Paris",..and so on...);
    Code (markup):
    allowing you to compare & link the city to the coutries based on the values you retrieve from the $_POST.. (keys are case sensitive) using in_array
    http://php.net/manual/en/function.in-array.php
     
    Last edited: May 4, 2015
    freelanceDeveloper, May 4, 2015 IP
  4. freelanceDeveloper

    freelanceDeveloper Member

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    #4
    Correction
    Use the values from your form's picklist , US, UK and not the descriptive words United states...
    
$Capital=array("US"=>"Washington","UK"=> "London","France"=>"Paris",..and so on...);
    Code (markup):
    depending on the requirements you could use a database... this will prevent you to rewrite your script every time you want to add a country... I would at least be consitent in your form and always use the countrycode as value... so FR instead of France... https://countrycode.org/

    Open php mode again in the form and loop your array again to print the picklist, no need to redo this manually and make mistakes by doing so
     
    Last edited: May 4, 2015
    freelanceDeveloper, May 4, 2015 IP
    Anveto likes this.