Get whether the check box is selected in PHP and write it to the database

Below we summarize the information about whether the check box is selected in PHP and written to the database. Friends who need to learn can refer to it.

form.html

代码如下 复制代码 3

7

1

15

Then create a program to process the form: checkbox.php

The code is as follows Copy code 代码如下 复制代码 $a=$_POST["s"]; print_r($a); ?>

$a=$_POST["s"];

print_r($a); ?> But the above program is only used to display whether the check box is normal. If you take out all the data in the array one by one, you need to use a loop. 代码如下 复制代码 $a=$_POST["s"]; for($i=0;$i { echo "选项".$a[$i]."被选中 "; } ?>

So the program is further modified to: checkbox.php

The code is as follows Copy code $a=$_POST["s"]; for($i=0;$i<count($a);$i++)

{ 代码如下 复制代码 1

2

3

4

echo "option".$a[$i]."selected "; } ?>

The result of this execution is similar to: Option 3 is selected Option 15 selected Use javascript to do preprocessing. Multiple checkboxes with the same name still exist in the form of arrays in javascript, so before submitting the form, you can use javascript to combine the information in the checkboxes into a character array and assign it to the hidden elements in the form, and then use php in The explode function parses this array, so that the check box information can be transferred. Below are examples. Suppose there is a form like this: The code is as follows Copy code 1 2 3 4 This form has four checkboxes whose names are all items. When the user clicks the submit button, the checker function will be called, and if the checker returns true, the form will be submitted. If it returns false, the form will not be submitted. . The checker function here is the preprocessing function we want to write. Add the following javascript in the header section of html:

The code is as follows 代码如下 复制代码 function checker() { form1.items.value = ""; if ( !form1.item.length ) // 只有一个复选框，form1.item.length = undefined { if ( form1.items.checked ) form1.items.value = form1.item.value; } else { for ( i = 0 ; i { if ( form1.item(i).checked ) // 复选框中有选中的框 { form1.items.value = form1.item(i).value; for ( j = i + 1 ; j { if ( form1.item(j).checked ) { form1.items.value += " "; //用空格做分割符 form1.items.value += form1.item(j).value; } } break; } } } return true; } -->

Copy code function checker() { form1.items.value = ""; if ( !form1.item.length ) // There is only one checkbox, form1.item.length = undefined { if (form1.items.checked) form1.items.value = form1.item.value; } else { for ( i = 0 ; i { if ( form1.item(i).checked ) // There is a checked box in the check box { form1.items.value = form1.item(i).value; for ( j = i + 1 ; j { if ( form1.item(j).checked ) { form1.items.value += " "; //Use spaces as separators form1.items.value += form1.item(j).value; } } break; } } } return true; } -->

http://www.bkjia.com/PHPjc/629008.html www.bkjia.com true http: //www.bkjia.com/PHPjc/629008.html TechArticle Below we summarize the information about whether the check box is selected in PHP and written to the database. Friends who need to learn can refer to it. refer to. form.html code is as follows Copy code form action=checkbox.ph...

Php8, I'm coming too

Learn website layout in 30 minutes

Shangguan Oracle Beginner to Proficient Video Tutorial

Your first line of UNI-APP code

Flutter from scratch to app launch

Brother Lian New Linux Video Tutorial

AXURE 9 Video Tutorial (Suitable for Product Manager Interactive Product Design UI)

Zero Basic Proficiency PS Video Tutorial

16 day UI video tutorial to get you started

PS Techniques and Slicing Techniques Video Tutorial

Alibaba Cloud Environment Construction and Project Launch Video Tutorial

Overview of Computer Networks - Basic Knowledge that Programmers Must Master

Essential Tutorial for Programmers - HTTP Protocol Explanation

Websocket Video Tutorial

Get whether the check box is selected in PHP and write it to the database_PHP tutorial

代码如下	复制代码
$a=$_POST["s"]; for($i=0;$i { echo "选项".$a[$i]."被选中 "; } ?>