Var_dump (bool )?) Related questions

Var_dump (bool )?) Var_dump (bool) & quot;); // bool (false) var_dump (bool) 1); // bool (true) var_dump (bool) -2); // bool (true var_dump (bool )?) Problems
Var_dump (bool) ""); // bool (false)
Var_dump (bool) 1); // bool (true)
Var_dump (bool)-2); // bool (true)
Var_dump (bool) "foo"); // bool (true)
Var_dump (bool) 2.3e5); // bool (true)
Var_dump (bool) array (12); // bool (true)
Var_dump (bool) array (); // bool (false)
Var_dump (bool) "false"); // bool (true)

In the past, if it is not 0, it is TRUE, but var_dump (bool) array () is also false. how can I determine TRUE or false in PHP?

------ Solution --------------------
If the value is not 0, the value is TRUE.
------ Solution --------------------
In PHP, when other types of variables are converted to boolean, the following values are considered FALSE:

Boolean value: FALSE;
Integer value 0 (zero );
Floating point value: 0.0 (0 );
Null string (""), and string ("0 ");
Array that does not contain any elements;
Objects that do not include any member variables (applicable only to PHP 4.0 );
Special type NULL (including unset variables );
SimpleXML object generated from an XML document without any tags;

All other values are considered to be TRUE (including any resources ).

Note:-1 is considered TRUE like other non-zero values (both positive and negative values!

Var_dump (bool) ""); // bool (false)
Var_dump (bool) 1); // bool (true)
Var_dump (bool)-2); // bool (true)
Var_dump (bool) "foo"); // bool (true)
Var_dump (bool) 2.3e5); // bool (true)
Var_dump (bool) array (12); // bool (true)
Var_dump (bool) array (); // bool (false)
Var_dump (bool) "false"); // bool (true)
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