QA


Q&A

Q

Must a control structure's test expression result in a Boolean value?

A

Ultimately, yes, but in the context of a test expression, zero, an undefined variable, or an empty string will be converted to false. All other values will evaluate to true.

Q

Must I always surround a code block in a control statement with brackets?

A

If the code you want executed as part of a control structure consists of only a single line, you can omit the brackets. However, the habit of always using opening and closing brackets, regardless of structure length, is a good one.



Sams Teach Yourself PHP MySQL and Apache All in One
Sams Teach Yourself PHP, MySQL and Apache All in One (4th Edition)
ISBN: 067232976X
EAN: 2147483647
Year: 2003
Pages: 333
Authors: Julie Meloni

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