form class not found in laravel code example

Example 1: laravel command not found

echo 'export PATH="~/.config/composer/vendor/bin"' >> ~/.bashrc
# or
echo 'export PATH="~/.config/composer/vendor/bin"' >> ~/.zshrc

Example 2: causes of class not found in laravel

the possible cause of this error can be:
1 class doesn’t exist
2.the class name case is not the same for example - Jalalian.php and jalalian.php are not the same even when the class name case is the same check to confirm that use statement has the right letter case. 
3. wrong namespace