How to check file is exists or not in PHP?

If you need to check file is exixt or not on folder. Normally we require to check image is exist or not, video is exists or not etc. In this example i use file_exists() for determine file is available or not in given path. So if you also need check then follow bellow example:

Example:

if(file_exists('./upload/flower.jpg')){
	print_r('Image is exist.');
}else{
	print_r('Image is not exist.');
}