My PHP Code-Standards Part 1
Here is a tutorial on how to write a nice and clean PHP code.
Let us start with variables.
I use prefix for variables with camel notation. This makes it easy to see and check the right variable for its type.
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$strName = 'ali' ;
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$intCounter = 1;
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$blnTrigger = true;
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$objMailSender = new mailSenderClass();
I use single quote for my data.
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$strMyNameIs = 'Alireza';
And I use double quotes for SQL or strings that I need to have a single quote inside.
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$strSQL = "SELECT * FROM person WHERE name LIKE 'ali' ";
I never use variable inside a double quote string. I break up the quote.
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$strCode = "some $bad code ";// WRONG AND UGLY
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$strNiceCode = 'Very ' . $strData . ' is pasted here' ;// NICE CODE
Never ever use short variables like $a or $temp or other lazy short names.
Use variable names that are understandable and describe what it contains.
And using a camelNotation makes it easy to read.
Never start with underscore or other kind of separator for names.
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$strReturn = 'Nice code';
Only use underscore for constants where you can not use tha camel notation.
And do not start with underscore. There are some other system variables and functions that starts with underscore like _get() or $_SESSION