PHP checkbox checkbox value acquisition and checkbox default value output method_PHP tutorial

How to get checkbox value in php

Copy code The code is as follows:

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< /label>
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if( $_POST )
{
$value = $_POST['checkbox'];
echo 'You selected:'.implode(',',$value);
//Due to the checkbox attribute, we must set the name of the checkbox to a if checkbox[] so that php can read it Take it in data form, otherwise the value of the checkbox cannot be read correctly. // Script House jb51.net Organize
}
?>

checkbox must use array form when reading the value in php, we read it These values ​​are obtained in the form of an array using php post,

Copy code The code is as follows:

< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">






$ area_arr = array();
if($_GET['action']=="submit"){
$area_arr = $_POST['area'];
}
echo "You select The specified area is: ";
foreach ($area_arr as $k=>$v){
echo $v." ";
}
?>

Hebei

Henan

Shanxi


< ;/label>

Shandong

Jiangsu

Zhejiang
< ;label>

< ;/p>

php checkbox default selection problem (all exploited This principle)

Copy code The code is as follows:

>

http://www.bkjia.com/PHPjc/321742.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/321742.htmlTechArticlephp method to get the checkbox value. Copy the code as follows: html xmlns="http://www. jb51.net/1999/xhtml" head meta http-equiv="Content-Type" content="text/html; charset=gb231...