Find the PHP binary in the path

get_php_bin_from_path.php

<?php
/**
 * Checks the path for the php binary and returns it's location if found
 *
 * @return false|string False on failure, String of binary location on success
 */
function get_php_bin_from_path() {
	$paths = explode( PATH_SEPARATOR, getenv( 'PATH' ) );
	foreach ( $paths as $path ) {
		// Windows XAMPP sometimes has the actual bin as the path
		if ( strstr( $path, 'php.exe' ) && isset( $_SERVER['WINDIR'] ) && file_exists( $path ) && is_file( $path ) ) {
			return $path;
		} else {
			$php_executable = $path . DIRECTORY_SEPARATOR . 'php' . ( isset( $_SERVER['WINDIR'] ) ? '.exe' : '');
			if ( file_exists( $php_executable ) && is_file( $php_executable ) )
				return $php_executable;
		}
	}
	return false; // not found
}