CSS

PHP executable not found. Install PHP and add it to your PATH or set the php.executablePath setting in linux

{
...
"php.validate.executablePath": "/opt/lampp/bin/php",
...
}

PHP executable not found. Install PHP 7 and add it to your PATH

{
    "php.validate.executablePath": "C:wamp64inphpphp7.0.4php.exe",
    "php.executablePath": "C:wamp64inphpphp7.0.4php.exe"
}

PHP executable not found. Install PHP 7 and add it to your PATH or set the php.executablePath setting

Step 1 : copy php.exe file locaton (Exp. C:xamppphp)
Step 2 : Right click on This Pc -> Click on Properties
Step 3 : Click on Advance System setting -> Environment Veriabl
Step 4 : Doubble clik on path -> New 
Step 5 : Paste php.exe path -> ok -> ok Done...