我已经编写了一些工作正常的代码,但非常冗长,希望获得有关如何提高效率的指导。我正在运行不同的 SQL 查询,因为一个查询会返回太多结果;
$sql1 = "select blah blah blah";
$sql2 = "select blah blah blah";
$sql3 = "select blah blah blah";
$response1 = $client->executeSQLQuery(array("sql"=>$sql1));
$response2 = $client->executeSQLQuery(array("sql"=>$sql2));
$response3 = $client->executeSQLQuery(array("sql"=>$sql3));
if( is_array($response1->return->row) )
{
foreach($response1->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo $response1->return->row->dnorpattern . "<br>";
$count++;
}
if( is_array($response2->return->row) )
{
foreach($response2->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo $response2->return->row->dnorpattern . "<br>";
$count++;
}
if( is_array($response3->return->row) )
{
foreach($response3->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo $response3->return->row->dnorpattern . "<br>";
$count++;
}
所以,我想将 if 语句更改为像这样的单个 if 语句;
if( is_array($response1->return->row) )
{
foreach($response1->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo $response1->return->row->dnorpattern . "<br>";
$count++;
}
$sql 和 $response 的整数是可以预测的,所以我应该可以使用 for 语句
for($x=1, $x<=3, $x++)
{
if( is_array($response[$x]->return->row) )
{
foreach($response[$x]->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo $response[$x]->return->row->dnorpattern . "<br>";
$count++;
}
}
但这不起作用,有人可以解释我如何正确地增加整数吗?
最佳答案
您可以使用大括号语法:
for($x=1; $x<=3; $x++)
{
if( is_array(${'response' .$x}->return->row) )
{
foreach(${'response' .$x}->return->row as $numbers)
{
echo $numbers->dnorpattern . "<br>";
$count++;
}
}
else
{
echo ${'response' .$x}->return->row->dnorpattern . "<br>";
$count++;
}
}
或者将您的三个响应对象保存在一个数组中,并使用您原来的语法:
$response = [];
$response[1] = $client->executeSQLQuery(array("sql"=>$sql1));
$response[2] = $client->executeSQLQuery(array("sql"=>$sql2));
$response[3] = $client->executeSQLQuery(array("sql"=>$sql3));
尽管您可能只编写更好的 SQL 查询并大大简化事情
关于php - 改进sql查询中的if语句,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34746762/