'Why are there periods in PHP? [duplicate]

Possible Duplicate:
What does the 'period' character (.) mean if used in the middle of a php string?

Why are the periods included in the code that follows?

require("mod/" . $modarrayout . "/bar.php");

Obviously, it's because the variable is between strings, but shouldn't the quotes have taken care of that? PHP

phpvariablesquote


Solution 1:[1]

The following is the same in this case:

require("mod/$modarrayout/bar.php");

Using string concatenation is a different approach to string building.

I suggest reading the manual page on strings.

Solution 2:[2]

There are two string operators. The first is the concatenation operator ('.'), which returns the concatenation of its right and left arguments. The second is the concatenating assignment operator ('.='), which appends the argument on the right side to the argument on the left side.

Read: String Operators

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Lightness Races in Orbit
Solution 2 Peter Mortensen

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