Answers for "php enable show error"

composer self update command

composer self-update

upgrade composer version

composer self-update

composer update

php composer.phar update

update composer mac

#Ubuntu-Download Composer and create a Phar (PHP Archive) file
$ curl -s https://getcomposer.org/installer | php

#Move it to bin directory
$ sudo mv composer.phar /usr/local/bin/composer

update composer php version

php7.3 -f /usr/local/bin/composer update

update composer

To update composer command just find location of composer.phar and update as:
 where composer 	#Retrieves you location of your composer.phar
 cd path_to_composer.phar #Move to directory with composer.phar
 php composer.phar self-update	#Update your composer

php show error

error_reporting(E_ALL);
ini_set('display_errors', 1);

show display error php

//PHP functions - add the lines in the above of page

ini_set('display_errors', 1);
ini_set('display_startup_errors', 0);
error_reporting(E_ALL & ~E_NOTICE);