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All PHP files should be encoded using UTF-8, with no byte-order-mark (BOM).

Programming Styles

Variables

Use logical and descriptive names for your variables. Variables used in iterating loops, such as $i, $j, $k, etc., are exceptions to this rule. Variables should contain only lower-case letters, underscores, and numbers, and should start with a letter.

$foo = 365; // not descriptive
$days_in_non_leap_year = 365; // too long
$_year_days = 365; // starts with an underscore

$year_days = 365;
$leap_year_days = 366;

Strings

Literals

Strings consisting of more than one character should be surrounded with double-quotes ("). Strings consisting of only a single character may be surrounded with single-quotes (').

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define("MY_CONSTANT", "some value");

Keywords

Keywords should always be lower-cased. This is so they do not conflict with constants.

Statements

Blesta uses Compact Control Readability style. Each statement should begin on its own line. The exception to this rule is do-while.

if ($foo > $bar) {
    echo "foo is greater";
}
else {
    echo "bar is greater";
}

$i = 5;
do {
    echo $i--;
}

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 while ($i > 0);

Classes

Methods

Comments

There are three types of comments that may be used in PHP. They are block comments (/* */), inline comments (//), and shell comments (#).

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<?php
class MyClass {
    #
    # TODO: Finish this class.
    #
}
?>