How does php obtain the values in the input box for comparison and display in the database? The input box

How does php obtain the values in the input box for comparison and display in the database? The input box

Front end:

<! -- Item query --> <input type = "text" name = "bianhao" value = "" maxlength = "10" size = "10" style = "width: 100px; margin: 0px 0px 0px 25px; height: 20px; "/> <input type =" submit "value =" item number query "style =" margin: 0px 0px 0px 10px; cursor: pointer; background-color: # C30D23; border: 0px; color: # FFFFFF; width: 85px; border-radius: 5px; padding: 3px 0; font-size: 13px; "/>

The php background receives and queries:

Public function MallList () {// write Method
$ Goods = M ('shop _ goods_info '); // instantiate the table corresponding to the database
$ Codes = I ('Param. bianhao'); // obtain the front-end text box data if (isset ($ codes) & $ codes! = '') {$ Where ['code'] = $ codes; $ this-> assign ('Codes ', $ codes); // display}
}

$ Info = $ classify-> where (array ('code' => $ code)-> find (); // query syntax

 

 

2. Or:

$ _ GET or $ _ POST

<Form action = ''method = 'post'> text box: <input type = 'text' name = 'text'> <input type = 'submit 'value = 'Submit ', name = 'sub'> </form> <? Phpif (! Empty ($ _ POST ['sub']) {echo $ _ POST ['text'];}?> Replace GET with GET.