Question

以下PHP代码应返回$zone为5. $postcodeprefix应为075.

我认为这不起作用，因为PHP将邮政编码视为整数而不是字符串。我尝试过这样的事情：

$postcode = $postcode." ";
$postcode = strval($postcode);

我尝试的所有事情都没有奏效。

修复是什么？

$postcode = 07558;//comes from database as a number. I can't change this.
$postcode = $postcode." "; //one of various ways I have tried to turn this into a string
$postcode = trim($postcode);

$zone = 99;
$postcodeprefix = substr($postcode,0,3);
echo "\$postcodeprefix=".$postcodeprefix."\n";
$postcodeprefixkey = substr($postcode,0,1); //this is the first postcode digit
echo "\$postcodeprefixkey=".$postcodeprefixkey."\n";
if ($postcodeprefixkey == 0) {
                //any range containing postcode which starts with 0
                if ($postcodeprefix >= 001 && $postcodeprefix <= 005) {$zone = 5;} else
                if ($postcodeprefix >= 006 && $postcodeprefix <= 009) {$zone = 6;} else
                if ($postcodeprefix >= 010 && $postcodeprefix <= 029) {$zone = 5;} else
                if ($postcodeprefix >= 030 && $postcodeprefix <= 054) {$zone = 6;} else
                if ($postcodeprefix >= 055 && $postcodeprefix <= 055) {$zone = 5;} else
                if ($postcodeprefix >= 056 && $postcodeprefix <= 059) {$zone = 6;} else
                if ($postcodeprefix >= 060 && $postcodeprefix <= 098) {$zone = 5;}
            } 
echo "\$zone=".$zone;

Answer 1

问题出在这一行：

$postcode = 07558;//comes from database as a number. I can't change this.

在这里，$ postcode已经是八进制值而且

$postcode = 07558;//comes from database as a number. I can't change this.
$postcode = $postcode." "; //one of various ways I have tried to turn this into a string
$postcode = trim($postcode);

echo $postcode;

给出493。

将其视为一个数字，这很容易：

$postcode  =  7558; // 07558 would be treated as octal value!

$postcodeC = intval($postcode / 100); // 075

if ( $postcodeC < 100 )
{
       ...
       if ($postcodeC >= 60 && $postcodeC <= 98) {$zone = 5;}
       ...
}

Answer 2

以下是我最终解决的问题。我欺骗了substr（）函数，没有使用这种技术将$ postcode重新解释为八进制数：

        $postcodeprefix = substr("x".$postcode,1,3);
        $postcodeprefixkey = substr("x".$postcode,1,1);

如何在PHP中获取以零开头的邮政编码的第一位数字

2 个答案: