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10 Cards in this Set
- Front
- Back
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What is the difference between a WAMP, a MAMP, and a LAMP?
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WAMP stands for “Windows, Apache, MySQL, and PHP,” while the M in MAMP
stands for Mac instead of Windows and the L in LAMP stands for Linux. They all refer to a complete solution for hosting dynamic web pages. |
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Are the operators && and and interchangeable?
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Generally, the operators && and and are interchangeable except where precedence
is important, in which case && has a high precedence while and has a low one. |
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How can you create a multiline echo or assignment?
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You can use multiple lines within quotation marks or the <<< _END ... _END construct
to create a multiline echo or assignment. |
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How do you convert one variable type to another (say, a string to a number)?
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To convert one variable type to another, reference it and PHP will automatically
convert it for you. |
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What is the difference between ++$j and $j++?
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There is no difference between ++$j and $j++ unless the value of $j is being tested,
assigned to another variable, or passed as a parameter to a function. In such cases, ++$j increments $j before the test or other operation is performed, whereas $j++ performs the operation and then increments $j. |
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Can you redefine a constant?
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You cannot redefine constants because, by definition, once defined they retain their
value until the program terminates. |
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What is the difference between the echo and print commands?
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The echo and print commands are similar, except that print is a PHP function and
takes a single argument while echo is a construct that can take multiple arguments. |
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How can you make a variable accessible to all parts of a PHP program?
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You can make a variable accessible to all parts of a PHP program by declaring it as
global. |
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If you generate data within a function, what are a couple of ways to convey the
data to the rest of the program? |
If you generate data within a function, you can convey the data to the rest of the
program by returning a value or modifying a global variable. |
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What is the result of combining a string with a number?
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When you combine a string with a number, the result is another string.
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