defines an execution operator in PHP. Strings enclosed in backticks (``) are treated as DOS commands (shell commands in UNIX/Linux) and their output is returned. The operation of this operator is similar to the shell_exec() function in PHP.
The following code executes the DIR command and returns the result as a string.
The following results will be displayed
Volume in drive C is Windows 10 Volume Serial Number is 540D-CE99 Directory of C:\xampp\php 01/27/2016 05:32 PM 18,869 CompatInfo.php 07/08/2020 06:40 PM 64 test.php 07/11/2020 02:13 PM 48 testscript.php 03/30/2013 05:59 PM 1,447 webdriver-test-example.php 4 File(s) 20,428 bytes 0 Dir(s) 178,002,157,568 bytes free
This is another example of the backtick operator. It executes the type command
will show the following results
type testscript.php
The above is the detailed content of PHP execution operator. For more information, please follow other related articles on the PHP Chinese website!