19c02-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 27 行

<?php
// Begin a try block so that we can catch any exceptions that happen:
try {
    // Let's generate a random number from 1 to 10
    $num = rand(1,10);
    
    // Ensure that the number is less than 3
    if ($num < 3) {
        // It's not, throw an appropriate exception
        throw new Exception('Number is too small');
    }
    
    // Now also don't allow the number to be greater than 7
    if ($num > 7) {
        // Another exception
        throw new Exception('Number is too big');
    }
    
    // Otherwise, we are happy with the number...
    echo "<p>Our new number is: {$num}</p>\n";
} catch (Exception $e) {
    // We caught the exception, so let's give the error to the user
    echo '<p>Exception: ', $e->getMessage(), "</p>\n";
}

echo "<p>Done!</p>";
?>