php 在不使用循环的情况下将字符串分解为关联数组？
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Explode a string to associative array without using loops?
提问by Pramod
I have a string like 1-350,9-390.99,..., and I need to turn it into an associative array like this:
我有一个像 的字符串1-350,9-390.99,...，我需要把它变成一个像这样的关联数组：
Array
(
[1] => 350
[9] => 390.99
...........
).
Is it possible to do this using only array functions, without a loop?
是否可以仅使用数组函数而不使用循环来执行此操作？
采纳答案by bozdoz
Here's a way to do it without a for loop, using array_walk:
这是一种无需 for 循环的方法，使用array_walk：
$array = explode(',', $string);
$new_array = array();
array_walk($array,'walk', $new_array);
function walk($val, $key, &$new_array){
$nums = explode('-',$val);
$new_array[$nums[0]] = $nums[1];
}
Example on Ideone.com.
Ideone.com上的示例。
回答by bishop
PHP 5.5+ two-line solution, using array_chunkand array_column:
PHP 5.5+ 两行解决方案，使用array_chunk和array_column：
$input = '1-350,9-390.99';
$chunks = array_chunk(preg_split('/(-|,)/', $input), 2);
$result = array_combine(array_column($chunks, 0), array_column($chunks, 1));
print_r($result);
Yields:
产量：
Array
(
[1] => 350
[9] => 390.99
)
回答by jel
Something like this should work:
这样的事情应该工作：
$string = '1-350,9-390.99';
$a = explode(',', $string);
foreach ($a as $result) {
$b = explode('-', $result);
$array[$b[0]] = $b[1];
}
回答by hafichuk
This uses array_walkwith a closure.
这使用带有闭包的array_walk。
<?php
$string = "1-350,9-390.99";
$partial = explode(',', $string);
$final = array();
array_walk($partial, function($val,$key) use(&$final){
list($key, $value) = explode('-', $val);
$final[$key] = $value;
});
print_r($final);
?>
回答by MuteX
Code is tested.
代码经过测试。
<?php
$array = "1-350,9-390.99";
$arr = explode(",",$array);
$desireArray = array();
foreach($arr as $value)
{
$val = explode("-",$value);
$desireArray[$val[0]] = $val[1];
}
?>
All the best.
祝一切顺利。
回答by Ilmari Karonen
Technically, it ispossible to do this without using loops (demo on codepad.org):
从技术上讲，这是可能做到这一点，而不使用（循环演示上codepad.org）：
$string = '1-350,9-390.99';
// first, split the string into an array of pairs
$output = explode(',', $string);
function split_pairs ($str) {
return explode('-', $str, 2);
}
$output = array_map(split_pairs, $output);
// then transpose it to get two arrays, one for keys and one for values
array_unshift($output, null);
$output = call_user_func_array(array_map, $output);
// and finally combine them into one
$output = array_combine($output[0], $output[1]);
var_export($output);
However, this is reallynot something you'd want to do in real code — not only is it ridiculously convoluted, but it's also almost certainly less efficient than the simple foreach-based solution others have already given (demo on codepad.org):
然而，这真的不是你想要在实际代码中做的事情——它不仅非常复杂，而且几乎肯定比foreach其他人已经给出的基于简单的解决方案效率低（codepad.org 上的演示）：
$output = array();
foreach ( explode( ',', $string ) as $pair ) {
list( $key, $val ) = explode( '-', $pair, 2 );
$output[$key] = $val;
}
回答by Amit Garg
$x='1-350,9-390.99';
$arr1=explode(',',$x);
$res_arr=array();
foreach($arr1 as $val){
$arr2=explode('-',$val);
$res_arr[$arr2[0]]=$arr2[1];
}
print_r($res_arr);
回答by Vinoth Babu
$string = '1-350,9-390.99........';
$final_result = array();
foreach (explode(',', $string) as $piece) {
$result = array();
$result[] = explode('-', $piece);
$final_result[$result[0]] = $result[1];
}
print_r($final_result);
回答by Hanky Panky
Try this
尝试这个
<?php
$string="1-350,9-390.99,4-569.34";
$values=explode(",",$string);
$output=array();
foreach($values as $value)
{
list($k,$v)=explode("-",$value);
$output[$k]=$v;
}
print_r($output);
?>
回答by Sithu
Try this:
尝试这个：
$string = '1-350,9-390.99';
$array = explode(',', $string);
$output = array();
foreach($array as $arr){
$chunk = explode('-', $arr);
$output[$chunk[0]] = $chunk[1];
}
echo '<pre>'; print_r($output); echo '</pre>';
