在索引数组PHP关联数组

Question

我有一个$string：

'Name Height Weight 
John 177  142 
Jill 156  123 
Jacob 183  157' 

而且我把它分为以下结构的$array：

Array (
    [0] => Array (
     ['Name'] => 'John' 
     ['Height'] => '177' 
     ['Weight'] => '142' 
    ) 
    [1] = > Array (
     ['Name'] => 'Jill' 
     ['Height'] => '156' 
     ['Weight'] => '123' 
    ) 
    [2] = > Array (
     ['Name'] => 'Jacob' 
     ['Height'] => '183' 
     ['Weight'] => '157' 
    ) 
) 

使用下面的代码：

$rows = explode("\n",$string); //creates an indexed array of rows as strings 
$headers = explode("\t",$rows[0]); //creates an indexed array of headers as strings 
$rows = array_slice($rows,1); //removes headers from $rows 
$array = Array(); 
foreach($rows as $row) { 
    $array[] = array_combine($headers, explode("\t",$row)); //creates associative arrays for each row 
} 

但是，我无法访问索引内部的关联数组

例如，这不起作用：

echo $array[0]['Name']; 

即使echo implode(', ', array_keys($array[0]));给出：

Name, Height, Weight 

我试图访问索引数组内的关联数组的许多不同的方式，但没有运气。我究竟做错了什么？

编辑：

所以，

$string = "Name Height Weight 
John 177 142 
Jill 156 123 
Jacob‌​ 183 157"; 

不工作，但

$string = "Name\tHeight\tWeight\nJohn\t177\t142\nJill\t156\t123\nJacob‌​‌​\t183\t157"; 

呢......

，所以我想的问题是：什么是区别？而我将如何解释前者的字符串为后者？

Answer 1

您的代码不会产生阵列结构，但它可以固定这样的：

$string = 'Name Height Weight 
John 177  142 
Jill 156  123 
Jacob 183  157'; 

$rows = explode("\n",$string); //creates an indexed array of rows as strings 

$headers = preg_split("#\s+#",trim($rows[0], "\n\r\t ")); //creates an indexed array of headers as strings, by splitting by any white space 
var_dump($headers); 

$rows = array_slice($rows,1); //removes headers from $rows 
$array = Array(); 
foreach($rows as $row) { 
    $array[] = array_combine($headers, preg_split("#\s+#",trim($row, "\n\r\t "))); //creates associative arrays for each row, by splitting by any white space 
} 

var_dump($array); 

这将产生输出：

array(3) { 
    [0]=> 
    string(4) "Name" 
    [1]=> 
    string(6) "Height" 
    [2]=> 
    string(6) "Weight" 
} 
array(3) { 
    [0]=> 
    array(3) { 
    ["Name"]=> 
    string(4) "John" 
    ["Height"]=> 
    string(3) "177" 
    ["Weight"]=> 
    string(3) "142" 
    } 
    [1]=> 
    array(3) { 
    ["Name"]=> 
    string(4) "Jill" 
    ["Height"]=> 
    string(3) "156" 
    ["Weight"]=> 
    string(3) "123" 
    } 
    [2]=> 
    array(3) { 
    ["Name"]=> 
    string(5) "Jacob" 
    ["Height"]=> 
    string(3) "183" 
    ["Weight"]=> 
    string(3) "157" 
    } 
} 

主要思想是，你必须通过修剪埃维行字符串任何额外的空格并按最长的空白序列分割。

Answer 2

//Use following code it will work as your answer 
$string='Name Height Weight 
John 177  142 
Jill 156  123 
Jacob 183  157'; 

$rows = explode("\n",$string); //creates an indexed array of rows as strings 

$headers = explode("\t",$rows[0]); //creates an indexed array of headers as strings 

$headers=array_filter(explode(" ",$headers[0])); ///t convert to space and filter remove empty element 

$rows = array_slice($rows,1); //removes headers from $rows 

$array = Array(); 
foreach($rows as $row) { 
    $row=explode("\t",$row); 
    $row=array_filter(explode(" ",$row[0])); 

    $array[] = array_combine($headers,$row); //creates associative arrays for each row 
} 

//print_r($array); 
echo $array[0]['Name'];