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I just saw the use of a backslash in a reference to a PHP object and was curious about it (I have never seen this before). What does it mean?
$mail = new SendGrid\Mail(); If you're curious, here's SendGrid's documentation.
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\ (backslash) is the namespace separator in PHP 5.3. A \ before the beginning of a function represents the Global Namespace. Putting it there will ensure that the function called is from the global namespace, even if there is a function by the same name in the current namespace.
The Scope Resolution Operator (also called Paamayim Nekudotayim) or in simpler terms, the double colon, is a token that allows access to static, constant, and overridden properties or methods of a class.
The addslashes() function returns a string with backslashes in front of predefined characters. The predefined characters are: single quote (') double quote (")
Definition and Usage. The stripslashes() function removes backslashes added by the addslashes() function. Tip: This function can be used to clean up data retrieved from a database or from an HTML form.
It's because they're using PHP namespaces. Namespaces are new as of PHP 5.3.
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