I want to do a negation check and then the else hit. How can I do it?
See the example!
<?php
$a = '';
if(!$a && !is_string($a)):
echo 'False';
else:
echo 'True';
endif;
How can I make a validation to check if a variable is empty and is a string in php
2
asked by anonymous 29.08.2015 / 15:56
2 answers
4
Saul, you can also create a function
<?php
function emptyAndString(&$var)
{
$var = trim($var);
return empty($var) && is_string($var);
}
$v = 'Valor';
var_dump(emptyAndString($v));
// bool(false)
$v = ' ';
var_dump(emptyAndString($v));
// bool(false)
$v = '';
var_dump(emptyAndString($v));
// bool(true)
29.08.2015 / 16:48
4
To give you one more option, the simplest way to do this is:
if ($string === '') {
}
With the trim, to ensure that nothing will go empty:
if (trim($string) === '') {
}
The === operator checks whether the value is identical, ie it compares not only values but types.
29.08.2015 / 18:38