PHP多图像按钮提交表单

Question

I have been creating a website where my users can rate images that have been uploaded. Currently i use radio buttons and a submit button to get the users rating and save it within the system. I would like to change this so that the code uses image clicks to get the users rating. So far i have the following code however it only works for one image button. Is there any way to change this to get the result depending on what image has been clicked.

Code:

HTML

<form>
<input
        type="image"
        name="flag_submit"
        src="img/Flag.png"
        onmouseover="this.src='img/Flag_Click.png'"
        onmouseout="this.src='img/Flag.png'"
        height="30"
        width="30"
        />
</form>

PHP

if (isset($_POST['flag_submit_x']))
{
    //Do process of rating.
}   

Is there any way that i could create multiple image buttons and in the PHP code detect what image button has been pressed?

Answer 1

1. Change name to an array name="flag_submit[1]". Assign a different value for each image and you got it.

2. Read it as an array on php side: if (isset($_POST['flag_submit'][1])).

Or better would be, loop throu if $_POST['flag_submit'] and find all values:

foreach ( $_POST['flag_submit'] as $value )  {
    echo $value . ' has been clicked.';
}

---

<form method="post">
<input type="image" name="rateButton[1]" src="img/Rate1.png" height="40" width="40" value="1"/> T
<input type="image" name="rateButton[2]" src="img/Rate1.png" height="40" width="40" value="1"/> T
<input type="image" name="rateButton[3]" src="img/Rate1.png" height="40" width="40" value="1"/> T
<input type="image" name="rateButton[4]" src="img/Rate1.png" height="40" width="40" value="1"/> T
</form>
<pre>
<?php
    if ( isset( $_POST['rateButton'] ) ) {
        foreach ( $_POST['rateButton'] as $key => $value ) {
            echo 'Image number '.$key.' was clicked.';
        }
    }
?>

In your case, you don't care, what value it sends, all you need to care about it is the key that was used to submit the form, because there will always be only one key set.