Are there any potential pitfalls to be aware of when checking for negative values in an array with PHP?

When checking for negative values in an array with PHP, one potential pitfall to be aware of is that using a simple comparison operator like `if ($value < 0)` may not work as expected if the array contains non-numeric values. To avoid this issue, you can use the `is_numeric()` function to first check if the value is a number before comparing it to 0. 

$array = [1, -2, &#039;foo&#039;, -4, 5];

foreach($array as $value) {
    if (is_numeric($value) &amp;&amp; $value &lt; 0) {
        echo &quot;Negative value found: $value\n&quot;;
    }
}

Keywords

array negative values PHP error handling data validation

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