Type Juggling

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PHP is a weakly-typed language. It does not require explicit declaration of data types. The context in which the variable is used determines its data type; conversion is done automatically:

$a = "2";             // string 
$a = $a + 2;          // integer (4) 
$a = $a + 0.5;        // float (4.5)
$a = 1 + "2 oranges"; // integer (3)

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