How to copy value input text to multiple/array input text - php

Question

I need to copy the input text to an array like this:
If the input is "12345":
<input type="text" name="data1">
Then in text input (array) also written "12345"
<? foreach ($countries as $data2)
{
<input type="text" name="$data2['location'][]">
}
<script language="javascript">
function copy()
{
document.form1.data2.value=document.form1.data1.value
}
</script>
<form action="" method="post" name="form1">
<input type="text" name="data1" onKeyUp="copy()"/>
<br /><br>
<input type="text" name="data2">
</form>
no problem...
But if like this:
<input type="text" name="data2[]">
<input type="text" name="data2[]">
<input type="text" name="data2[]">
OR in array PHP, like this :
<?php foreach ($countries as $data2): ?>
<input type="text" name="<?php echo $data2['location'][] ?>" />
<?php endforeach ?>
dont work...

Answer 1

It seems you need to open and close your PHP tags in the right place. If the name of your HTML input control is $data2['location'][], then try this:
<?php foreach ($countries as $data2): ?>
<input type="text" name="<?php echo $data2['location'][] ?>" />
<?php endforeach ?>
So, I've closed PHP mode before and after both the loop keywords (the start of the loop and the end of it). This means that everything outside of those tags is in HTML mode, so to get the name of the control, we need to open the tags again. I've chosen to use <?php rather than <? because the latter can be turned off on some servers. However, it is fine to stick with the short form if you don't mind that the code is not portable.
Notice also that I've used the colon with the more explicit end keyword. This is a popular way of constructing loops in the view layer; for ordinary controller code, I suggest you stick to ordinary braces.