如何将以下格式的字符串解析为关联数组？
[ ["key1", "value1"], ["key2", "value2"], ["key3", "value3] ]
进入：
Array
(
["key1"] => "value1"
["key2"] => "value2"
["key3"] => "value3"
)
谢谢！
编辑：数据采用字符串格式，即：
$stringdata ='[ ["key1", "value1"], ["key2", "value2"], ["key3", "value3"] ]';
使用循环和循环遍历整个数组，并使用第一个元素作为键，第二个元素作为值将值分配到一个新数组中。通常是这样的：
$new_array = array();
foreach($array as $arr) {
$new_array[$arr[0]] = $arr[1];
}
但要将字符串解析为数组，我将采用以下RegEx方法，然后进行循环：
$str = '[ ["key1", "value1"], ["key2", "value2"], ["key3", "value3"] ]';
preg_match_all('/('[("(.*?)"), ("(.*?)")'])/i', $str, $matches);
//Now we have in $matches[3] and $matches[5] the keys and the values
//and we would now turn this into an array using a loop
$new_array = array();
for($k = 0; $k < count($matches[3]); $k++) {
$new_array[$matches[3][$k]] = $matches[5][$k];
}
查看此实时演示https://3v4l.org/u3jpl
使用array_reduce 的函数方法
<?php
$ar = [ ["key1", "value1"], ["key2", "value2"], ["key3", "value3"] ];
$newAr = array_reduce($ar, function($carry, $item) {
$carry[$item[0]] = $item[1];
return $carry;
});
var_dump($newAr);
输出：
array(3) {
["key1"]=>
string(6) "value1"
["key2"]=>
string(6) "value2"
["key3"]=>
string(6) "value3"
}
这里有一个使用json_decode的解决方案。
<?php
$json = json_decode('[["key1", "value1"], ["key2", "value2"], ["key3", "value3"]]');
$final = array();
foreach($json as $value) {
$final[] = array($value[0]=>$value[1]);
}
final是所需格式的数组。