生成短链接,php5.6可用,为什么php7生成不了?

<code>function shortUrl($long_url){
    $key = '123';
    $base32 = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

    // 利用md5算法方式生成hash值
    $hex = hash('md5', $long_url.$key);
    $hexLen = strlen($hex);
    $subHexLen = $hexLen / 8;

    $output = array();
    for($i=0;$i> 5;
        }
        $output[$i] = $out;
    }
    // 生成位数
    return $output;

}


print_r( shortUrl('http://www.google.com/') );</code>

<code>Array
(
    [0] => MVvIZz
    [1] => qURRjy
    [2] => U7rIzu
    [3] => JNNJbi
)</code>

<code>Array
(
    [0] => aaaaaa
    [1] => aaaaaa
    [2] => aaaaaa
    [3] => aaaaaa
)</code>

<code>function shortUrl($long_url){
    $key = '123';
    $base32 = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

    // 利用md5算法方式生成hash值
    $hex = hash('md5', $long_url.$key);
    $hexLen = strlen($hex);
    $subHexLen = $hexLen / 8;

    $output = array();
    for($i=0;$i> 5;
        }
        $output[$i] = $out;
    }
    // 生成位数
    return $output;

}


print_r( shortUrl('http://www.google.com/') );</code>

<code>Array
(
    [0] => MVvIZz
    [1] => qURRjy
    [2] => U7rIzu
    [3] => JNNJbi
)</code>

<code>Array
(
    [0] => aaaaaa
    [1] => aaaaaa
    [2] => aaaaaa
    [3] => aaaaaa
)</code>