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201.1 .
is_numeric in action
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201.2 .
Returns true if $a is a string
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201.3 .
Create Object and get its type
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201.4 .
Create Object and check its type
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201.5 .
Returns true if $a is an integer
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201.6 .
Returns true if $a is a floating-point number
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201.7 .
Returns true if $a is an array
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201.8 .
gettype() and settype() Data Types
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is_numeric in action
