如何使复选框被选中

Question

如何使用 PHP 选中我的复选框，当我稍后访问该页面时，我希望选中以前选择的复选框

<input  name="product[]" type="checkbox" value="1" />

Answer 1

Start Session as

    <?php
session_start();
$session_products = array();
if(array_key_exists("products", $_SESSION)) 
{
  if($_SESSION["products"] != null)
  {
    $session_products = $_SESSION["products"];
  }
}

?>

Change your code as follows

<input  name="product[]"  type="checkbox" value="1" <?php if(in_array("1", $session_products)) echo "checked='checked'"; ?>/>

Answer 2

You can add a checked .

Here an example:

<input  name="product[]"  type="checkbox" value="1" checked />

By the way, your value=1 seems to be wrong. Normally you use `value to distinguish items.

Example:

<input  name="product[]"  type="checkbox" value="dvd" checked />
<input  name="product[]"  type="checkbox" value="cd" />

Answer 3

to do something like this with php

<input  name="product[]"  type="checkbox" value="1" <?php echo ($value =="1") ? "checked" : ""; ?> />

where $value is the value from database