php operation php file_PHP tutorial

Sounds a little dizzy? ! ! Use php to operate php pages. There is a small use. In a system, there may be individual small items that are inconvenient to be stored in the database, but we often call them in other pages and need to be updated, so we can solve it in this way. I encountered a few minor problems and it took me half a day to solve them

For example: the user needs to change a certain title, but it is obviously not appropriate to create a table for this title alone. So I thought of writing this variable into the php file for call by other pages. name.php file, the required content is as follows:

$name="Title";

?>

The two words "title" need to be updated by the user. So how do we achieve it:

A simple submission information page add_name.php

A page addname.php that receives and processes user-submitted information

$name=$_POST[name]; //Receive the name value passed from add_name.php
if(empty($name)){ //Determine whether it is empty
?>

}else{
$filename="name.php"; //Define the operation file
$delline=2; //The number of lines to be deleted
if(!file_exists($ filename)){ //Determine whether the file exists
die("The specified file was not found! Operation interrupted!");
}
$farray=file($filename); //Read file data to In the array
for($tmpa=0;$tmpa if(($tmpa+1)==2){ //Judge the number of rows
$ farray[$tmpa]="$name2=".""".$name.""; “; 🎜>}
$fp=@ fopen($filename,"w") or die("Failed to open file $filename in write mode");

//We open the file in writing mode

@fwrite($fp,$newfp) or die("File writing failed");

@fclose($fp);                                                                                                                                                                                            

This code is only for testing 117-202 1Z0-043 1z0-042. The irregularities in writing are quite amusing!

This way we can use it to update the variables in the name.php file. Of course, this is a relatively stupid method (who told me that I am also a stupid person). There are many ways to realize this requirement.

In the line marked with *, we use escape characters. This is very simple to say, but when I tested it, I wasted a lot of time due to improper methods. Now paste the escape character table below:

Escape character sequence meaning

Line feed (LF or ASCII character 0x0A (10))

Carriage return (CR or ASCII character 0x0D (13))

Horizontal tab (HT or ASCII character 0x09 (9))

Backslash

$ Dollar sign

" Double quotes

[0-7]{1,3} This regular expression sequence matches a character represented in octal notation
x[0-9A-Fa-f]{1,2} This regular expression sequence matches A character represented in hexadecimal notation


For string processing alone, using single quotes is faster than using double quotes, so you need to choose appropriate quotes in your program.

http://www.bkjia.com/PHPjc/486631.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/486631.htmlTechArticleSounds a little dizzy, right? ! ! Use php to operate php pages. There is a small purpose. In a system, there may be individual small items that are inconvenient to be stored in the database, but we often have to...