12: I want to add a file to the top of each file and the last one. But one of the added very troublesome
1: Open php.ini file
Set include_path= "C:"
2: Write two files
Auto_prepend_file.php and auto_append_file.php are saved in the C disk and they will automatically attach to the head and tail of each PHP file.
3: Found in php.ini:
Automatically add files before or after any PHP document.
Auto_prepend_file = auto_prepend_file.php; attached to the head
Auto_append_file = auto_append_file.php; attached to the tail
Every PHP file you have in the future is equivalent
PHP Code:--------------------------------------------------------------------------------
<?php
Include "auto_prepend_file.php";
...//This is your program.
Include "auto_append_file.php";
?>
--------------------------------------------------------------------------------
13: How to upload files using PHP
PHP Code:--------------------------------------------------------------------------------
<title> Upload File Form </title><body>
<form enctype= "Multipart/form-data" action= "" method= "POST" >
Please select File: <br>
<input name= "Upload_file" type= "file" ><br>
<input type= "Submit" value= "Upload file" >
</form>
</body>
?
$upload _file=$_files[' upload_file ' [' tmp_name '];
$upload _file_name=$_files[' upload_file ' [' name '];
if ($upload _file) {
$file _size_max = 1000*1000;//1M limit file upload maximum capacity (bytes)
$store _dir = "d:/";//upload file storage location
$accept _overwrite = 1;//whether to allow overwriting of the same file
Check File size
if ($upload _file_size > $file _size_max) {
echo "Sorry, your file capacity is greater than the provisions";
Exit
}
Check read and write files
if (file_exists ($store _dir. $upload _file_name) &&! $accept _overwrite) {
Echo "file with same filename";
Exit
}
Copying files to a specified directory
if (!move_uploaded_file ($upload _file, $store _dir. $upload _file_name)) {
echo "Copy file failed";
Exit
}
}
Echo "<p> you uploaded the file:";
echo $_files[' upload_file ' [' name '];
echo "<br>";
The original name of the client machine file.
The MIME type of the Echo file is: ";
echo $_files[' upload_file ' [' type '];
The MIME type of the file, which requires the browser to provide support for that information, such as "Image/gif".
echo "<br>";
Echo "Upload file size:";
echo $_files[' upload_file ' [' Size '];
The size of the uploaded file in bytes.
echo "<br>";
Echo "file is temporarily stored as:";
echo $_files[' upload_file ' [' tmp_name '];
The temporary file name stored on the server after the file is uploaded.
echo "<br>";
$Erroe =$_files[' upload_file ' [' Error '];
Switch ($Erroe) {
Case 0:
Echo "Upload success"; Break
Case 1:
Echo "uploaded a file that exceeds the Upload_max_filesize option limit in php.ini." Break
Case 2:
Echo "The size of the upload file exceeds the value specified by the Max_file_size option in the HTML form. "; Break
Case 3:
Echo "file is only partially uploaded";
Case 4:
Echo "no file uploaded";
}
?>
--------------------------------------------------------------------------------
14: How to configure the GD library
The following is my configuration process
1: With dos command (can also manually operate, copy all DLL files in DLLs folder to system32 directory) copy C:phpdlls*.dll c:windowssystem32
2: Open php.ini
Set extension_dir = "c:/php/extensions/";
3:
Extension=php_gd2.dll: Remove the comma before extension, and if there is no php_gd2.dll,php_gd.dll, make sure that the document exists C:/php/extensions/php_gd2.dll
4: Run the following program to test
PHP Code:--------------------------------------------------------------------------------
<?php
Ob_end_flush ();
Note that you cannot output any information to the browser until then, and be aware that Auto_prepend_file is set.
Header ("Content-type:image/png");
$im = @imagecreate (200, 100)
Or Die ("Cannot create image");
$background _color = imagecolorallocate ($im, 0, 0, 0);
$text _color = imagecolorallocate ($im, 230, 140, 150);
Imagestring ($im, 3, M, "A simple Text String", $text _color);
Imagepng ($im);
?>
--------------------------------------------------------------------------------
Click here to view the results
15: What is UBB code
UBB code is a variant of HTML, is Ultimate Bulletin Board (a foreign BBS program, there are many places in the domestic use of this program) a special tag.
Even if you prohibit the use of HTML, you can use Ubbcode? Maybe you'd prefer to use Ubbcode? Instead of HTML, even if the forums allow HTML, it's safer to use less code.
Q3boy's UBB has an example to run the test directly
16: I want to modify the MySQL user, password
The first thing to declare is that in most cases, MySQL is required to have root privileges in MySQL,
Therefore, the general user cannot change the password unless the administrator is requested.
Method One
Using phpMyAdmin, this is the easiest, to modify the MySQL library's user table,
But don't forget to use the password function.
Method Two
Using Mysqladmin, this is a special case of the previous declaration.
Mysqladmin-u root-p Password mypasswd
After entering this command, you need to enter the original password for root, and then the root password will be changed to MYPASSWD.
Change the command root to your username, and you can change your password.
Of course, if your mysqladmin is not connected to MySQL server, or you have no way to execute mysqladmin,
Then this method is ineffective.
And mysqladmin can't empty the password.
The following methods are used at the MySQL prompt and must have the root permissions of MySQL:
Method Three
Mysql> INSERT into Mysql.user (Host,user,password)
VALUES ('% ', ' Jeffrey ', PASSWORD (' biscuit '));
Mysql> FLUSH Privileges
To be exact, this is adding a user, the username is Jeffrey, and the password is biscuit.
There is this example in the MySQL Chinese reference manual, so I wrote it.
Note that you want to use the password function, and then use flush privileges.
Method Four
And method Three, just use the Replace statement
Mysql> REPLACE into Mysql.user (Host,user,password)
VALUES ('% ', ' Jeffrey ', PASSWORD (' biscuit '));
Mysql> FLUSH Privileges
Method Five
Using the Set Password statement,
Mysql> SET PASSWORD for jeffrey@ "%" = PASSWORD (' biscuit ');
You must also use the password () function,
But you don't need to use flush privileges.
Method Six
Use Grant ... Identified by statement
Mysql> GRANT USAGE on *.* to jeffrey@ "%" identified by ' biscuit ';
Here the password () function is unnecessary and does not require the use of flush privileges.
Note: PASSWORD () [is not] the password encryption is performed in the same way as the UNIX password encryption.
17: I want to know which website he is connecting to this page
PHP Code:--------------------------------------------------------------------------------
<?php
Must go through the super connection to have output
Echo $_server[' Http_referer '];
?>
--------------------------------------------------------------------------------
18: Data into the database and take out to display in the page need to pay attention to what
When in storage
$str =addslashes ($STR);
$sql = "INSERT INTO ' tab ' (' Content ') VALUES (' $str ')";
When you are out of the library
$str =stripslashes ($STR);
When displayed
$str =htmlspecialchars (NL2BR ($STR));
19: How to read the current address bar information
PHP Code:--------------------------------------------------------------------------------
<?php
$s = "http://{$_server[' http_host ']}:{$_server[" server_port "]}{$_server[' Script_name ']}";
$se = ';
foreach ($_get as $key => $value) {
$se. = $key. " = ". $value." & ";
}
$se =preg_replace ("/(. *) &$/", "$", $se);
$se? $se = "?". $se: "";
echo $s. "? $se ";
?>
--------------------------------------------------------------------------------
20: I click on the Back button, why the missing items before filling
This is because you use the session.
Solution:
PHP Code:--------------------------------------------------------------------------------
<?php
Session_cache_limiter (' Private, must-revalidate ');
Session_Start ();
...........
..........
?>
--------------------------------------------------------------------------------
21: How to display the IP address in the picture
PHP Code:--------------------------------------------------------------------------------
?
Header ("Content-type:image/png");
$img = Imagecreate (180,50);
$ip = $_server[' remote_addr '];
Imagecolortransparent ($img, $bgcolor);
$bgColor = Imagecolorallocate ($img, 0X2C,0X6D,0XAF); Background color
$shadow = Imagecolorallocate ($img, 250,0,0); Shadow color
$textColor = Imagecolorallocate ($img, Oxff,oxff,oxff); Font Color
Imagettftext ($img, 10,0,78,30, $shadow, "D:/windows/fonts/tahoma.ttf", $IP); Show background
Imagettftext ($img, 10,0,25,28, $textColor, "D:/windows/fonts/tahoma.ttf", "Your IP is". $ip); Show ip
Imagepng ($IMG);
Imagecreatefrompng ($IMG);
Imagedestroy ($IMG);
?>
--------------------------------------------------------------------------------
22: How to get the user's real IP
PHP Code:--------------------------------------------------------------------------------
?
function Iptype1 () {
if (getenv ("Http_client_ip")) {
Return getenv ("Http_client_ip");
}
else {
return "None";
}
}
function Iptype2 () {
if (getenv ("Http_x_forwarded_for")) {
Return getenv ("Http_x_forwarded_for");
}
else {
return "None";
}
}
function Iptype3 () {
if (getenv ("REMOTE_ADDR")) {
Return getenv ("REMOTE_ADDR");
}
else {
return "None";
}
}
function IP () {
$ip 1 = iptype1 ();
$ip 2 = iptype2 ();
$ip 3 = Iptype3 ();
if (Isset ($ip 1) && $ip 1!= "None" && $ip 1!= "Unknown") {
return $IP 1;
}
ElseIf (Isset ($ip 2) && $ip 2!= "None" && $ip 2!= "Unknown") {
return $IP 2;
}
ElseIf (Isset ($ip 3) && $ip 3!= "None" && $ip 3!= "Unknown") {
return $IP 3;
}
else {
return "None";
}
}
Echo IP ();
?>
--------------------------------------------------------------------------------
23: How to read all records in three days from the database
First, there is a datetime field in the table to record the time,
Format is ' 2003-7-15 16:50:00 '
SELECT * from ' xltxlm ' WHERE to_days (now ())-to_days (' Date ') <= 3;
24: How to remotely link the MySQL database
In the Add user's MySQL table there is a host field, modified to "%", or specifies the IP address that allows the connection, so that you can call it remotely.
$link =mysql_connect ("192.168.1.80:3306", "Root", "");
25: Exactly how to use
Click here
Special characters in regular expressions
26: With Apache, the homepage appears garbled
Method One:
Adddefaultcharset Iso-8859-1 changed to adddefaultcharset off
Method Two:
Adddefaultcharset GB2312
========================================================
Tip
GB2312 will be interpreted as a?????? when everyone pastes the code.
That's not going to happen.
GB2312
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