重新索引数组值

Question

我想在 php 示例中重新索引我的数组中的键和值，如果删除数据：“2”，数据 3 将重新索引为 2 并且里面的值array 3 {sequence : 3 "ssdummy tossssdo 3"}将更改为{sequence : 2 "ssdummy tossssdo 3"}{"sequence": 2,"data": {"1": {"sequence": "1", "todo": "dummy todo"},"2": {"sequence": "2", "todo": "dummy todo 2"},"3": {"sequence": "3", "todo": "ssdummy tossssdo 3"},}}

Answer 1

首先，您可以将值转换为数组，因为输入是 json。然后解析数组，删除所需的值。解析数组后，您可以将其转换回 json（如果需要）。下一个脚本删除$valueToRemove变量中指示的值。

<?php

$jsonValues = '{

"sequence": 2,

"data": {

    "1": {"sequence": "1", "todo": "dummy todo"},

    "2": {"sequence": "2", "todo": "dummy todo 2"},

    "3": {"sequence": "3", "todo": "ssdummy tossssdo 3"}

    }

}';

$valueToRemove = 2;

$arrayValues = json_decode($jsonValues, true);

$oldData = $arrayValues['data'];

$newData = array();

$counter = 0;

foreach ($oldData as $oldIndex => $oldValue) {

    if ($valueToRemove != $oldIndex) {

        $counter++;

        $newData[$counter] = array(

                'sequence' => $counter,

                'todo' => $oldValue['todo']

        );

    }

}

$arrayValues['data'] = $newData;

$jsonValues = json_encode($arrayValues);

var_dump($jsonValues);

?>

我从脚本中得到以下输出：

{"sequence":2,"data":{"1":{"sequence":1,"todo":"dummy todo"},"2":{"sequence":2,"todo":"ssdummy tossssdo 3"}}}