In-depth discussion on the implementation method of PHP drop-down box selection_PHP tutorial

Implementation

The first PHP drop-down box implementation method:

1. < ?php
2. / /Submit drop-down box;
3. //Directly trigger the result of onchange event
4. $id=$_GET['myselect']; // myselect
   is the name of location.herf?id;
5. echo $id;
6. //Results submitted using the form;
7. if($_POST["sendSelect"]){ //sendSelect is the name of the form;
8. $select_val=$_POST["selectID"];
9. echo "The value you selected is: $select_val";
10. }
11. // print_r($_POST);
12. $xing="xing";
13. $fang="fang" ;
14. a href=del_03.php?id='.$xing.' &action='.$fang.'
    >flx< /a>'; //In php, When deleting content, the prompt given is written; href must be followed by quotation marks; echo "n"."<
16. input type='button' value= 'Delete'
    onclick="if(confirm('Confirm to delete ?')) { location.href='?delete=$result_manage[p_id]'}"
    > < br
17. >< br>"; } echo "<
19. input type='button' value='connect_next' onclick="location.href='del_03.php?id=
    $xing&action=$fang'"> ;";
20. ?> >The second implementation method of PHP drop-down box selection:
The above is an introduction to the two implementation methods of PHP drop-down box.

< input type="button" value="delete" onclick="
if(confirm('确定要删除吗')) location.href=
'del_03.php?id=xing'">< br/> 

< script language="JavaScript" type="text/javascript"> 

function select(obj){  

window.location.href='del_04.php?myselect=
'+obj.options[obj.selectedIndex].value;  

return; //可以不写;  
}  

< /script> 


< input type="button" value="delete" 
onclick="if(confirm('确定要删除吗')) 
location.href='del_03.php?id=xing'">< br/> 


< form name="myform" action="del_04.php" 
method="post"> 


< !-- 直接触发onchange 事件 ,此时不用提交表单,-- > 


< !--< select name="selectID" onchange=
"location='del_04.php?myselect='+this.options
[this.selectedIndex].value">--> 


< !-- 把onchange 的事件写在一个函数里面-- > 


< select name="selectID" onchange="select(this)"> 


< !-- < select name="selectID" >--> 


< option value="0">请选择< /option> 


< option value="value1">option1< /option> 


< option value="value2">option2< /option> 


< option value="value3">option3< /option> 


< /select> 


< input type="submit" name="sendSelect" 
value="提交下拉框"/> 


< /form> 

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http: //www.bkjia.com/PHPjc/445968.htmlTechArticleImplement the first PHP drop-down box implementation method: ?php //Submit the drop-down box; //Directly trigger onchange The result of the event $ id =$_GET['myselect'];//myselect is the name of location.herf?id; echo$i...