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is_string

is_string

Find whether the type of a variable is string

bool **is_string** mixed $value

Finds whether the type of the given variable is string.

valueThe variable being evaluated.

Returns true if is of type , false otherwise. value``string

Voorbeeld: 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));
}
?>

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)

is_float``is_int``is_bool``is_object``is_array

Vorige ← is_scalar Volgende isset →

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