使用echo POSTBACK值回显输入字段

Question

So I'm iterating through a set value via a for loop, which will echo html input fields, every other echo'd html input field behaves as expected (including the name and id fields of the one below), however I keep getting syntax errors when trying to set the value as a postback to retain them on page submit. Here is my code:

$type = "number".$i;
echo '<input type="text" name="'.$type.'" id="'.$type.'" value="'.<?php if (isset($_POST[$type])) { echo $_POST[$type]; } else { echo NULL;}.'" />';

Thanks in advance.

Answer 1

You have an extra <?php statement in the row. Since the line is echo '...'. you don't need to declare that more php code is coming. You can do something like this instead:

echo '<input type="text" name="'.$type.'" id="'.$type.'" value="';
if (isset($_POST[$type])) echo $_POST[$type];
echo '" />';

Although personally, I prefer to do something like <input [...] id="{$type}" [...]" outside of the php code, less messy.