卷曲，PHP - 环环路

Question

我想是这样的：

$i = 1; 
$y = 1; 

while($i <= 10 and $y <= 5) 
{ 
if($i==10) 
{ 
echo 'I = '.$i.', Y = '.$y.'<br>'; 
$i = 1; 
$y = $y+1; 
} 
else 
{ 
echo 'I = '.$i.', Y = '.$y.'<br>'; 
$i = $i + 1; 
} 
} 

它返回

I = 1, Y = 1 
I = 2, Y = 1 
.... 
I = 1, Y = 2 
I = 2, Y = 2 
.... 
I = 1, Y = 3 
I = 2, Y = 3 

等，等，与卷曲使用。但它不起作用。我究竟做错了什么？

$i = 1; 
$y = 1; 

while($y <= 9) 
{ 
while($i==499) 
{ 
if($connection = db_connect()) 
{ 
$post = array('something' => 'abc', 'value_of_y' => ''.$y.'', 'value_of_i' => ''.$i.''); 
$str = curl_grab_page('http://localhost/send.php?true=1','','off',$post); 

$str2 = mysql_real_escape_string($str); 
$sql = "INSERT INTO abc (txt) VALUES ('$str2')"; 

$i = 1; 
$y = $y+1; 
} 
else 
{ 
echo 'Database connection error!'; 
} 
} 
while($i != 499) 
{ 
if($connection = db_connect()) 
{ 
$post = array('something' => 'abc', 'value_of_y' => ''.$y.'', 'value_of_i' => ''.$i.''); 
$str = curl_grab_page('http://localhost/send.php?true=1','','off',$post); 

$str2 = mysql_real_escape_string($str); 
$sql = "INSERT INTO abc (txt) VALUES ('$str2')"; 

$i = $i + 1; 
} 
else 
{ 
echo 'Database connection error!'; 
} 
} 
} 

但是页面一直在载入，没有任何反应。我必须使用“if（$ connection = db_connect（））{”但我认为这是让我的代码搞乱了。你能看一下吗？谢谢。

Answer 1

我的解决办法如下：

$y = $x = 1; 

if (!$connection = db_connect()) { 
    echo "connection failed!"; 
} else { 
    while ($y <= 9) { 
    $x = 1; 
    while ($x <= 499) { 
     // do your things with $x and $y, don't forget mysql_query() ! 

     $x++; 
    } 
    y++; 
    } 
} 

Answer 2

也许这是一个开始？

$sql = "INSERT INTO abc (txt) VALUES ('".$str2."')";