Conversion of PHP Data types

1. Coercion of type conversions

SetType (' variable ', ' value ')

Value: Can be any of the 8 big data types

Variables: (8 Big data types) variables that need to be converted

$var="123abc"; SetType ($var'int')  ); Var_dump ($var);

Execution result: int  123

$var="123abc"; $New= (int) $var; var_ Dump ($new);

Execution Result: int 123

2. Automatic type conversion

(most used, variables are automatically converted according to the environment)

$str ='123abc'; $int='521'; $result = $str +$int//+ number requires a numeric var_dump ($result) on both sides;

Execution Result: int 644

(Functions related to data types)

$arr=array(1,2,3,4,5); $a=getType($arr); Var_dump ($a);

Execution Result:

string

' array ' (length=5)

(Each data type will have a function to determine if this is the type)

Is_int ();

Is_float ();

Is_string ();

Is_array ();

Is_numeric (); Used to determine whether a numeric type, integral type, and float type are numeric types

$num=123; $flo=3.1415926; Var_dump (is_numeric($num)); Echo "<br/>"; Var_dump (is_numeric($flo));

Execution Result:

Boolean

True

Boolean

True

Conversion of PHP Data types