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1.1. Radio Box
Single.html
<! DOCTYPE html>
<title> single option pass value </title>
<meta charset= "Utf-8" >
<body>
<form method= "GET" action= "single.php" >
<p> Username: <input type= "text" name= "username"/></p>
<p>
Gender
<input type= "Radio" name= "Gender" value= "1"/> Male
<input type= "Radio" name= "Gender" value= "2"/> Female
<input type= "Radio" name= "Gender" value= "3"/> Secrecy
</p>
<p> Password: <input type= "password" name= "password"/></p>
<p><input type= "Submit" value= "Submission" ></p>
</form>
</body>
single.php
<?php
Header (' Content-type:text/html;charset=utf8 ');
Echo ' <pre> ';
Var_dump ($_get);
Note:
1.2. Multi-select box
Muliselect.html
<! DOCTYPE html>
<title> single option pass value </title>
<meta charset= "Utf-8" >
<body>
<form method= "POST" action= "muliselect.php" >
<p> Username: <input type= "text" name= "username"/></p>
<p>
Hobby
<input type= "checkbox" Name= "hobby[" value= "singing" > Singing
<input type= "checkbox" Name= "hobby[" value= "Dance" > Dance
<input type= "checkbox" Name= "hobby[]" value= "movie" > Movie
<input type= "checkbox" Name= "hobby[]" value= "basketball" > Basketball
</p>
<p><input type= "Submit" value= "Submission" ></p>
</form>
</body>
muliselect.php
<?php
Header (' Content-type:text/html;charset=utf8 ');
/*echo ' <pre> ';
Var_dump ($_post); * *
1, connecting the database
mysql_connect (' localhost:3306 ', ' root ', ' aaa ');
mysql_query (' Set names UTF8 ');
mysql_query (' use php2018 ');
2, receive data
$user _name = Trim ($_post[' username ');
$user _gender = $_post[' gender ');
$hobby = $_post[' hobby ');
$user _password = MD5 (Trim ($_post[' password '));Convert an array to a string to write to the database
$user _hobby = Implode (', ', $hobby);3, Data warehousing
$sql = "INSERT INTO user values
(NULL, ' $user _name ', ' $user _gender ', ' $user _hobby ', ' $user _password ') ";$result = mysql_query ($sql);
if ($result) {
echo ' Insert success ';
}else {
Echo ' Insert failed ';
}/*create Table User (
user_id int primary Key auto_increment,
User_name varchar () NOT NULL default ' anonymous ',
User_gender enum (' 1 ', ' 2 ', ' 3 ') Comment ' 1 is male 2 is female 3 is confidential ',
User_hobby set (' Sing ', ' Dance ', ' movie ', ' Basketball '),
User_password Char (32)
);*/
Note:
Implement file uploads, by following these steps:
1), on the server side to open the file upload function;
2), on the browser side to provide the ability to upload files form. The fact is to add properties to the form: enctype= "Multipart/form-data";
3), the use of $_files to receive uploaded documents related information;
4), verification documents;
5), move the files from the temporary folder to the specified directory.
In fact, the use of a function: Move_upload_file (temporary file name, the target directory and file name); There is a return value, if the upload succeeds returns true, otherwise it returns false;
PHP default upload temporary folder is under the C disk, and sometimes because of permissions issues will cause upload failure, so we generally modify the uploaded temporary folder.
Encapsulate File Upload function
upload.php
3. File download Ii. HTTP protocol 1, Request protocol<?php
# File Upload function
/**
* File Upload
* @param array $file upload the file information (is an array, there are 5 elements)
* @param array $allow file upload type
* @param string & $error reference type to log error messages
* @param string $path File upload path
* @param int $maxsize = 2*1024*1024 the size of the file allowed to upload
* @return false| $newname returns False if the upload fails, and returns the new name of the file if successful
*/
function upload ($file, $allow,& $error, $path, $maxsize =2097152) {
# 1, Judging system errors
Switch ($file [' ERROR ']) {
Case 1:
$error = ' upload error, beyond the size of the file limit! ‘;
return false;
Case 2:
$error = ' upload error, beyond the size allowed by the form! ‘;
return false;
Case 3:
$error = ' upload error, file upload is incomplete! ‘;
return false;
Case 4:
$error = ' Please select the file you want to upload first! ‘;
return false;
Case 6:
Case 7:
$error = ' Sorry, the server is busy, please try again later! ‘;
return false;
}
# 2, Judging logic errors
2.1. Determine file size
if ($file [' Size '] > $maxsize) {
$error = ' exceeds the file size, the maximum allowable value is: '. $maxsize. ' bytes ';
return false;
}
2.2. Determine file type
if (!in_array ($file [' type '], $allow)) {
Illegal file type
$error = ' The uploaded file type is incorrect, the allowed type is: '. Implode (', ', $allow);
return false;
}
# 3, get the new name of the file
$newname = Randname ($file [' name ']);
# 4, move temporary files to the specified path
$target = $path. ‘/‘ . $newname;
if (Move_uploaded_file ($file [' Tmp_name '], $target)) {
return $newname;
}else {
$error = ' An unknown error occurred and the upload failed! ‘;
return false;
}
}
# define a function that produces a random name
/**
* @param the old name of the string $filename file
* @param a new name for string $newname file
*/
function Randname ($filename) {
The time portion of the generated file name
$newname = Date (' Ymdhis ');
Plus a random six-digit number.
$str = ' 0123456789 ';
Get six-bit random numbers
for ($i =0; $i < 6; $i + +) {
Add the random number you get to the new name
$newname. = $str [Mt_rand (0,strlen ($STR))];
}
Plus suffix name
$newname. = STRRCHR ($filename, '. ');
return $newname;
}
?>
1.1. Composition: Request line, request header, blank line, request data
1.1.1, request line. Divided into three parts: request mode, request path, protocol version
1.1.2, request header.
The request header is the collection of all the protocol entries that are currently needed!
The protocol is the browser in the request server in advance to tell the server some information, and each of the protocol entries to occupy a single line!
Common Request headers:
1.1.3, empty line
Used to separate the request header from the request data, meaning that the request header is over!
1.1.4, request data
2. Response Agreement2.1. Composition: Response line, response header, blank line, response body
Iii. session Technology 1, cookies1.1. Basic operation
1.2. Properties
1.3. Precautions
2.1. Basic operation
Additions and deletions are done through the $_session array.
2.2. Properties
The implementation of the session requires the support of a cookie, which has the same properties as the cookie.
2.3. Precautions
2.4, the session of the destruction
| Cookies | Session | |
| Storage location | Browser-side | Server-side |
| Data volume | Big | Small |
| Types of data stored | can only be a string | Any type |
| Security | Lower | Higher |
| The default valid path | Can only be the current directory and its subdirectories | The whole station is valid |
1.1. Create a canvas
Imagecreatetruecolor (Width,height);
1.2. Create a brush color
Imagecolorallocate (Img,red,green,blue);
1.3. Draw the text (draw on the canvas)
Imagestring (Img,size,x,y,string,color);
1.4. Output or save pictures
Before you output:
1), set the response header information: header ("Content-type:image/png");
2), clear buffer data: Ob_clean ();
V. File operation 1, Directory basic operation<?php
# 1. Create a canvas
$canWidth = 170; The width of the canvas
$canHei = 40; The height of the canvas
$img = Imagecreatetruecolor ($canWidth, $canHei);
# 2. Fill the canvas with the background color
$bgColor = Imagecolorallocate ($img, Mt_rand (0,120), Mt_rand (0,120), Mt_rand (0,120));
Imagefill ($img, 1, 1, $bgColor);
#/3, defining the display text on the canvas
Displays the range of random characters
$arr = Array_merge (range (' A ', ' Z '), Range (' A ', ' Z '), range (0, 9));
A random character that gets the specified number of digits
$str = ";
Shuffle ($arr);
$charNum = 4; Number of verification codes
$KEYARR = Array_rand ($arr, $charNum);
foreach ($keyArr as $value) {
$str. = $arr [$value];
}
4. Writing characters to the canvas
$span = Ceil ($canWidth/($charNum + 1));
for ($i =1; $i <= $charNum; $i + +) {
Create a brush color for the canvas
$charColor = Imagecolorallocate ($img, Mt_rand (120,255), Mt_rand (120,255), Mt_rand (120,255));
Imagestring ($img, 5, $span * $i, N, $str [$i-1], $charColor);
}
5. Create interference lines
for ($i =0; $i < 8; $i + +) {
Create Interference line Colors
$linColor = Imagecolorallocate ($img, Mt_rand (75,150), Mt_rand (75,150), Mt_rand (75,150));
Create a disturbance line
Imageline ($img, Mt_rand (0, $canWidth-1), Mt_rand (0, $canHei-1), Mt_rand (0, $canWidth-1), Mt_rand (0, $canHei-1), $ Lincolor);
}
6. Display pictures
Header (' content-type:image/png ');
Ob_clean ();
Imagepng ($IMG);
?>
(The move here is essentially renaming, but the name of the directory is not just the file name, but also the path to the directory, when we change the path of the directory, it is both a mobile directory, can be said to be renamed;)
1.2. Common Directory operation function
1.3. Recursively traverse the directory
bianli.php
2. File operation<?php
/**
* Recursive traversal of files
* @param string $path directory path (address)
* @param int $deep = 0 Depth of current directory
*/
function Readdirs ($path, $deep =0) {
$dir _handle = Opendir ($path); Get the handle to the $path directory
while (false!== $file = ReadDir ($dir _handle)) {
Filter out./And.. /
if ($file = = "." | | $file = = "..") {
Continue
}
Output file
Echo str_repeat ('-', $deep), $file, ' <br/> ';
Enter recursive points and recursive exits
if (Is_dir ($path. '/'. $file)) {
Readdirs ($path. '/'. $file, $deep + 1);
}
}
}
$path = './';
Readdirs ($path);
?>
2.1, the basic operation of the file
2.2. Common file functions
Web typical application technology in PHP
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