在PHP中使用逗号后，将地址等分为2部分

Question

我面临的情况是，如果地址超过80个字符，我需要将address平分为2个部分，即address1和address2。

我能够用strlen添加以下条件来查找地址是否大于80个字符，但是当地址长度超过80个字符时，在逗号之后平均划分地址时会遇到问题。

我的代码如下： -

// Sample Address
$address = "House No. 1234-ABC, Second Floor, XYZ Building, ABC Mall Road, Street Number 1234, ABC Area";

$address_length = strlen($address);

if(address_length > 80){
    // Split Long Address Code
    $address_equal_length = $address_length/2;
    $address1 = substr($address,0,$address_equal_length);
    $address2 = substr($address,$address_equal_length,$address_length); 
}

不幸的是，上面的代码不会检查逗号并拆分地址如下： -

$address1 = "House No. 1234-ABC, Second Floor, XYZ Buildin";
$address2 = "g, ABC Mall Road, Street Number 1234, ABC Area";

你可以看到它切割Building字并在Buildin和$address1开头的g结尾显示为$address2

我想将$address分成如下： -

$address1 = "House No. 1234-ABC, Second Floor, XYZ Building";
$address2 = "ABC Mall Road, Street Number 1234, ABC Area";

希望可以有人帮帮我！提前致谢 ：）

Answer 1

一个好的开始可能是：

// Sample Address
$address = "House No. 1234-ABC, Second Floor, XYZ Building, ABC Mall Road, Street Number 1234, ABC Area";

$address_length = strlen($address);

if($address_length > 80){
    // Split Long Address Code
    $address_equal_length = $address_length/2;
    $commaIndex = strrpos(substr($address,0,$address_equal_length),',');
    $address1 = substr($address, 0,$commaIndex);
    $address2 = substr($address,$commaIndex + 1); 
}

您需要测试$ commaIndex是否存在以确保substr不会失败。

编辑

优化的解决方案，在字符串的中心查找最接近的逗号：

<?php

// Sample Address
$address = "House No. 1234-ABC, Second Floor, XYZ Building, ABC Mall Road, Street Number 1234, ABC Area";

$address_length = strlen($address);

if($address_length > 80){
    // We gonna look for the comma which is the more close to the center of the string
    $address_equal_length = $address_length/2;
    $comma_index_before = strrpos(substr($address, 0, $address_equal_length), ',');
    $comma_index_after = strpos($address, ',', $address_equal_length);
    if ($comma_index_before === false) {
        $comma_index_before = 0;
    }
    if ($comma_index_after === false) {
        $comma_index_after = $address_length;
    }
    $comma_index = $address_equal_length - $comma_index_before <= $comma_index_after - $address_equal_length ? $comma_index_before : $comma_index_after;

    $address1 = substr($address, 0, $comma_index);
    $address2 = substr($address, $comma_index + 1); 
}

Answer 2

动态正则表达式是此任务最直接/最合适的工具。

代码：（Demo）

$address = "House No. 1234-ABC, Second Floor, XYZ Building, ABC Mall Road, Street Number 1234, ABC Area";
$length = strlen($address);  // 91
if ($length > 80) {
    $middle = floor(strlen($address) / 2);  // 45
    [$address1, $address2] = preg_split("~.{{$middle}}[^,]*\K, ?~", $address, 2);
}

在我的演示中，输出来自：

var_export($address1);
echo "\n";
var_export($address2);

是：

'House No. 1234-ABC, Second Floor, XYZ Building'
'ABC Mall Road, Street Number 1234, ABC Area'

我使用var_export()来表示这些值，以证明此解决方案包括在拆分点进行空白修剪。

模式细分是：

.{{$middle}}评估为.{45}意味着匹配任何字符的45次出现 [^,]*匹配零个或多个非逗号字符 \K重新启动全字符串匹配，也就是忘记以前匹配的字符 , ?匹配逗号分割，并可选择跟随它的空格

我正在写preg_split()的2的硬限制只是明确/安全。

我之前推荐过这种类型的技术，当提出一个很好的省略号时（更多信息）：How to add an ellipsis hyperlink after the first space beyond 170 characters?

Answer 3

如果地址总是除以2个逗号，则可以使用explode和array_chunk来获取许多项目。然后使用implode重新组装零件。

这也适用于2个以上的地址。

$address = "House No. 1234-ABC, Second Floor, XYZ Building, ABC Mall Road, Street Number 1234, ABC Area";
$address_length = strlen($address);

if ($address_length > 80) {
    $parts = explode(',', $address);
    list($address1, $address2) = array_map(function($x) {
        return trim(implode(',', $x));
    }, array_chunk($parts, 3));
}

Php demo

Answer 4

这将是我的想法首先你把所有的逗号部分放在一个数组中，然后迭代它们，看看它们是否添加到前一个长度超过80，如果你转到下一行

   $addressParts=explode(",",$address);
   $endString="";
   $currentLine="";
   foreach($addressParts as $addressPart){
       if(str_len($currentLine.$addressPart)>80){
           $endString=$endString.","$currentLine."<br>";
           $currentLine=$addressPart;
       }else{
           if($currentLine != ""){
              $currentLine=$currentLine.", ".$addressPart;
           }else{
              $currentLine=$currentLine.$addressPart;
            }
       }
   }
   $endString=$endString.$currentLine;

   echo $endString;