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How do I turn off PHP notifications?

In PHP, notifications- they are undefined variables specified in a PHP project on multiple lines or specific lines. This usually does not affect or break the functionality of the written code. When PHP notifications encounter errors, they will be displayed like this:
PHP Notice: Use of undefined constant name - assumed ’name’ in line number 
PHP edits differ from PHP versions. Therefore, the methods for turning off PHP notifications are as follows:Method 1:This is the easiest and most convenient way to turn off notifications. Notifications can be disabled via the php.inifile settings. In the current file, find the line of code error_reporting . There will be a line of default values: E_ALL,as shown below: Replace this line of code with the default: E_ALL & amp; ~ E_NOTICE . It will display all errors except notifications. Make sure the part is enabled and then restart or update the server for PHP. In some versions of PHP, the default is Default: E_ALL & amp; ~ E_NOTICE .Method 2:To disable notifications, a line of code can be added to the PHP file, at the beginning of the file code. For example, gfg.php
The following code will look something like this  
// Open file $file = fopen ( "gfg.txt" , "w" ) or die ( "Unable to open file!" );  
// Save the string to a variable $txt = "GeeksforGeeks" ;  
// Write text content to file fwrite ( $file , $txt );  
// Save the string to a variable $txt = "Welcome to Geeks!" ;  
// Write text content to file fwrite ( $file , $txt );  
// Close file fclose ( $file );  
?>
Add this line at the beginning of the code:
 error_reporting (E_ERROR | E_WARNING | E_PARSE); 
error_reporting (E_ERROR | E_WARNING | E_PARSE);  
// Open file $file = fopen ( "gfg.txt" , "w" ) or die ( " Unable to open file! " );  
// Save the string to a variable $txt = "GeeksforGeeks" ;  
// Write text content to file fwrite ( $file , $txt );  
// Save the string to a variable $txt = "Welcome to Geeks!" ;  
// Write text content to file fwrite ( $file , $txt );  
// Close file fclose ( $file );  
?>
It will display errors, warnings and parsing errors during compilation.Method 3:’ @ ’ can be added to any statement to disable PHP notifications during the current operation:
@ $mid = $_POST [’ mid ’];

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