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200-530 · Question #3741
What is the difference between isset() and other is_*() functions (is_alpha(), is_number(), etc.)?
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PHP Basics
Question
What is the difference between isset() and other is_*() functions (is_alpha(), is_number(), etc.)?
Options
- Aisset() is a function call and is_*() are not function calls
- Bis_*() are language constructs and isset() is not a language construct
- Cc) isset() is a language construct and is_*() are not language constructs
- Dd) is_*() return a value whereas isset() does not
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Topics
#isset#language constructs#is_* functions#type checking