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[英]Creating an associative array with keys from a simple indexed array of strings
[英]Creating an associative array with strings
我從文本文件中讀取了一些單詞,並使用file()函數將每個單詞存儲為數組元素。 現在,我需要對每個單詞進行排序,並創建一個關聯數組,將排序后的字符串存儲為鍵,將原始字符串存儲為值,如下所示:
$hash_table = array( 'sorted_string' => 'original string' );
我遍歷從文件中讀取的每個單詞,並按升序對其進行排序,但是當將其推入關聯數組時,我完全迷失了。 誰能告訴我如何創建關聯數組?
$a = array('green', 'yellow', 'red');//actual
$b = array('green', 'yellow', 'red');
sort($b); //sorted
$c = array_combine($b, $a);
如果我正確理解您的問題,請考慮以下問題:
$sorted; //sorted array
$original; //original array
foreach($sorted as $key){
$index = 0;
$new_array[$key] = $original[$index++];
}
這是您想要的:
<?php
//create an array with words, similar to what you get with file()
$str = "here is a list of random words that will be sorted";
$array = explode(" ", $str);
//a place to store the result
$result = array();
//check each value
foreach($array as $word) {
//str_split will create an array from a string
$letters = str_split(trim($word));
//sort the letters
sort($letters);
//implode the letters again to a single word
$sorted = implode($letters);
//add to result
$result[$sorted] = $word;
}
//dump
var_dump($result);
//sort on the key
ksort($result);
//dump
var_dump($result);
?>
這將輸出
//unsorted
array(11) {
["eehr"]=>
string(4) "here"
["is"]=>
string(2) "is"
["a"]=>
string(1) "a"
["ilst"]=>
string(4) "list"
["fo"]=>
string(2) "of"
["admnor"]=>
string(6) "random"
["dorsw"]=>
string(5) "words"
["ahtt"]=>
string(4) "that"
["illw"]=>
string(4) "will"
["be"]=>
string(2) "be"
["deorst"]=>
string(6) "sorted"
}
//sorted on key
array(11) {
["a"]=>
string(1) "a"
["admnor"]=>
string(6) "random"
["ahtt"]=>
string(4) "that"
["be"]=>
string(2) "be"
["deorst"]=>
string(6) "sorted"
["dorsw"]=>
string(5) "words"
["eehr"]=>
string(4) "here"
["fo"]=>
string(2) "of"
["illw"]=>
string(4) "will"
["ilst"]=>
string(4) "list"
["is"]=>
string(2) "is"
}
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