我想以一种不同的方式爆炸变量

Question

我有这个变量.

$var = "A,B,C,D,'1,2,3,4,5,6',E,F";

我想爆炸它,以便我得到以下数组.

array(
[0] => A,
[1] => B,
[2] => C,
[3] => D,
[4] => 1,2,3,4,5,6,
[5] => E,
[6] => F
);

我用过,explode(',',$var)但我没有得到我想要的输出.有什么建议？

Answer 1

有一个现有的函数可以解析以逗号分隔的字符串.该函数是str_getcsv

它的签名是这样的:

array str_getcsv ( string $input [, string $delimiter = "," [, string $enclosure = '"' [, string $escape = "\\" ]]] )

您唯一的更改是将第三个变量(机箱)更改为单引号而不是默认的双引号.

这是一个例子.

$var = "A,B,C,D,'1,2,3,4,5,6',E,F";
$array = str_getcsv($var,',',"'");

如果您var_dump是数组,您将获得所需的格式:

array(7) {
  [0]=>
  string(1) "A"
  [1]=>
  string(1) "B"
  [2]=>
  string(1) "C"
  [3]=>
  string(1) "D"
  [4]=>
  string(11) "1,2,3,4,5,6"
  [5]=>
  string(1) "E"
  [6]=>
  string(1) "F"
}

Answer 2

只需使用preg_match_all以下正则表达式,如下所示

preg_match_all("/(?<=').*(?=')|\w+/",$var,$m);
print_r($m[0]);

正则表达式说明:

• (?<=').*(?=') 捕捉其中的每个角色 '(quotes)
• |\w+ |(OR) 将抓取其余的字符除外 ,

演示

正则表达式

Answer 3

虽然preg_split一起array_map工作非常好,但请参阅下面的示例使用explode和trim

$var = "A,B,C,D,'1,2,3,4,5,6',E,F";

$a = explode("'",$var);

//print_r($a);
/*
outputs
Array
(
    [0] => A,B,C,D,
    [1] => 1,2,3,4,5,6
    [2] => ,E,F
)
*/
$firstPart = explode(',',trim($a[0],',')); //take out the trailing comma
/*
print_r($firstPart);
outputs
Array
(
    [0] => A
    [1] => B
    [2] => C
    [3] => D
)
*/
$secondPart = array($a[1]);

$thirdPart = explode(',',trim($a[2],',')); //tale out the leading comma
/*
print_r($thirdPart);
Array
(
    [0] => E
    [1] => F
)
*/

$fullArray = array_merge($firstPart,$secondPart,$thirdPart);
print_r($fullArray);
/*
ouputs
Array
(
    [0] => A
    [1] => B
    [2] => C
    [3] => D
    [4] => 1,2,3,4,5,6
    [5] => E
    [6] => F
)
*/

Answer 4

您需要将字符串分解为数组.

但是,除了最后一个元素之外,每个元素之后都需要逗号.

这是工作示例:

<?php
$var = "A,B,C,D,'1,2,3,4,5,6',E,F";
$arr = explode("'", $var);
$num = ! empty($arr[1]) ? str_replace(',', '_', $arr[1]) : '';
$nt = $arr[0] . $num . $arr[2]; 
$nt = explode(',', $nt);
$len = count($nt);
$na = array();
$cnt = 0;
foreach ($nt as $v) {
    $v = str_replace('_', ',', $v);
    $v .= ($cnt != $len - 1) ? ',' : '';
    $na[] = $v;
    ++$cnt; 
}

演示