How does php skip when it encounters an error

How does php skip when it encounters a mistake? I believe many inexperienced people are at a loss about it. Therefore, this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Php encountered errors to skip the implementation methods: 1, open the corresponding PHP code file; 2, through the @ error control operator to suppress the error.

This article operating environment: windows7 system, PHP7.1 version, Dell G3 computer.

How does php skip when it encounters an error?

PHP skips the error to continue execution:

The @ error control operator can do this.

The @ symbol can ignore errors and has the function of suppressing errors.

For example:

Function db_connect () / / Connect to database {@ $db = mysql_connect ('localhost','root','test'); if (! $db) {throw new Exception (' failed to connect to database! Please try again!');} mysql_select_db ('book'); return $db;}

If the connection to the database is not successful, the previous "@" will be able to suppress the error, that is, it will not show the error, and then throw an exception to show the self-defined exception handling. It is recommended to use less, which will increase the system overhead.

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