PHP should be in the PATH, either locally or remotely. (bug#76242).

PHP should be in the PATH, either locally or remotely. (bug#76242).

* lisp/progmodes/php-ts-mode.el
(php-ts-mode-php-default-executable): Renamed from
'php-ts-mode-php-executable'.
(php-ts-mode--executable): New function that returns the absolute
filename of the PHP executable, local or remote, based on
'default-directory'.
(php-ts-mode--anchor-prev-sibling): Replaced 'when-let' with
“when-let*.”
(php-ts-mode--indent-defun): Replaced 'when-let' with
'when-let*'.
(php-ts-mode-run-php-webserver): Use the new function
(php-ts-mode-php-default-executable).
(run-php): Use the new function (php-ts-mode-php-default-executable).

(cherry picked from commit 99ff59bd66cc07df40b14cb0a8acf22d440581e5)