Php_get Data acquisition

Php_get Data acquisition

In PHP , if you want to get get data submitted through the method, you can get it through the $_GET object (although the parameters 地址栏 can be viewed in the)

• HTML code: Here is a simple form code to submit the data to 01.php , using get the way

  <form action= "01.php" method= "get" > for  = "" > Name:      <input type= "text" Name= "UserName" ></label>      <br/> for  = "" > Mailbox:      <input type= "text" Name= "UserEmail" ></label>      <br/>      <input type= "Submit" Name= "" ></form>

• PHP Code:

<? PHP      Echo ";     Echo ' UserName: '. $_get [' UserName '];     Echo ' <br/> ';     Echo ' UserEmail: '. $_get [' UserEmail '?>

Php_post Data acquisition

In PHP , if you want to get post data submitted through a method, you can $_POST get the object

• HTML code:  here is a simple form code that submits the data to 02.php , using the post method (Note: The method in the code changed to post )

   <form action= "02.php" method= "POST" > <label for  = "" > Name: <input type= "text" name= "UserName" ></label> <b r/> <label for  = "" > Mailbox: <input type= "text" name= "UserEmail" ></l abel> <br/> <input type= "Submit" name= "" ></FORM> 

   

• PHP Code:

<? PHP      Echo ";     Echo ' UserName: '. $_post [' UserName '];     Echo ' <br/> ';     Echo ' UserEmail: '. $_post [' UserEmail '?>

Post&get Error Handling

When we direct access POST GET to the & page because there is no data transmission, there will be $_GET $_POST no corresponding key and error.

• Treatment Mode 1:
  • Use array_key_exists(key, 数组) functions to make judgments
  • Parameter 1: Key to detect字符串
  • Parameter 2: Array of tests

    if (array_key_exists$_get)) {        // If there is data to read again    } Else {        //  Conversely, some other logic can be executed    }

PHP File Upload processing 01_ $_FILESObject

html代码中The following settings are required when uploading a file:

1. When html表单中 you need to setenctype="multipart/form-data"
2. Only post way PHP receive files can be $_FILES obtained by

• HTML code:

  <form action= "03.fileupdate.php" method= "post" enctype= "Multipart/form-data" > for      = "" > Photos:          <input type= "file" name = "Picture" multiple= "" ></label>      <br/>      <input type= "Submit "Name=" ">  </form>

• PHP Code 01 This part of the code to test the specific contents of the $_files file

  <? PHP     Sleep (5); // let the server rest for a while  Print_r ($_files);? >

• Phenomenon:

  • After clicking Submit, the server did not react immediately, but rested for a whilesleep(5)
  • wamp/tmpa file appears under the directory .tmp
  • .tmpThe file will be automatically deleted in a minute.
  • The contents of the server return, the name of the file [name] => computer.png , and the location where the file was savedD:\wamp\tmp\php3D70.tmp

PHP file Upload processing 02_ file Save

Just demonstrated the $_FILES role of the object, and PHP accept the upload file, will be saved in a temporary directory, then we will show how to 临时目录 save the following file.

• HTML code: This part of the code does not need to change

  <form action= "03.fileupdate.php" method= "post" enctype= "Multipart/form-data" > for      = "" > Photos:          <input type= "file" name = "Picture" multiple= "" ></label>      <br/>      <input type= " Submit "Name=" >  </form>

• PHP code move_uploaded_file() This function can handle the file W3cschool_move_uploaded_file function interpretation

Array Array (         = = computer.  PNG         = image/png         = D:\wamp\tmp\php8913.  TMP         = 0 [Size] = 5212 )     )

Where we need to picture get through (depending on the properties of the form label name ) 临时文件名 and上传文件名

<? PHP       Sleep (5); // let the server rest for a while so that we can view the uploaded temporary files/    /The first parameter is the file to be moved    //The second parameter is the new location of the specified file    move_uploaded_file(  $_files[' picture '] [' tmp_name '], './upload/'. $_files [' Picture '] [' Name '?>

Php_get Data acquisition