Another thing to note is that echo accepts multiple parameters where as print does not.

Some people prefer to pass multiple string's to echo in multiple parameters rather than concatenation.

PHP Code:

echo 'String 1', 'String 2';

echo 'String 1' . 'String 2'; 


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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)