Php/docs/function.is-string
From Get docs
is_string
(PHP 4, PHP 5, PHP 7)
is_string — Find whether the type of a variable is string
Parameters
var
- The variable being evaluated.
Return Values
Returns TRUE
if var
is of type string,
FALSE
otherwise.
Examples
Example #1 is_string() example
<?php$values = array(false, true, null, 'abc', '23', 23, '23.5', 23.5, , ' ', '0', 0);foreach ($values as $value) { echo "is_string("; var_export($value); echo ") = "; echo var_dump(is_string($value));}?>
The above example will output:
is_string(false) = bool(false) is_string(true) = bool(false) is_string(NULL) = bool(false) is_string('abc') = bool(true) is_string('23') = bool(true) is_string(23) = bool(false) is_string('23.5') = bool(true) is_string(23.5) = bool(false) is_string('') = bool(true) is_string(' ') = bool(true) is_string('0') = bool(true) is_string(0) = bool(false)
See Also
- is_float() - Finds whether the type of a variable is float
- is_int() - Find whether the type of a variable is integer
- is_bool() - Finds out whether a variable is a boolean
- is_object() - Finds whether a variable is an object
- is_array() - Finds whether a variable is an array