PHP/empty
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< PHP
empty is a language construct used to determine if a variable is considered empty.
bool empty ( mixed $var )
empty() is the opposite of (boolean) $var, except that no warning is generated when the variable is not set. Passing anything for $var which is not explicitly a variable will cause a parse error.
empty returns false if var has a non-empty and non-zero value.
The following are considered empty:
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