PHP RFC - Deprecate backtick operator

• Version: 42.0.0-epsilon
• Date: 2018-02-11
• Author: WesNetmo
• Status: Under Discussion
• First Published at: https://wiki.php.net/rfc/deprecate-backtick-operator

The backtick operator (`dir D:\foo`) is used to execute commands via shell.

The same functionality is also available as shell_exec().

This RFC proposes to deprecate it in PHP 7.3 and suggest to use shell_exec() instead:

• in case PHP decided in future to use backtick enclosed strings for Unicode strings
• because it is shady way to execute a rare and dangerous operation
• because it is weirdly specific for a rare operation; regexp literals, xml-strings literals are way more common use cases, but they don't have a specific string literal

None.

7.3

2/3 majority will be required.

- Discussion on externals