I'm a little confused why I see some code in PHP with string placed in single quotes and sometimes in double quotes.
I just know in .NET, or the C language, if it is in a single quote, that means it is a character, not a string.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…