Question

How to check if string is a negative integer in PHP

Answer 1

$str = "-24";
 
$n = (int)$str;

echo $n < 0 ? "yes" : "no";
 
 
 
 
/*
run:
 
yes
 
*/

 

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Answer 2

$str = "-24";
 
$n = (int)$str;
 
if (is_int($n) && $n < 0 ) {
    echo "yes";
} else {
    echo "no";
}
 
 
 
 
/*
run:
 
yes
 
*/

 

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