[英]How can I change the value of key of array base on another key?
我有这个变量,这是我的查询结果:
Array(
[0] => Array
(
[id] => 1
[visibility] => 0
)
[2] => Array
(
[id] => 2
[visibility] => 1
)
[3] => Array
(
[id] => 3
[visibility] => 0
)
)
现在,我想在[id]
项目的[visibility]
为0
时更改其数量。 例如,我想在[id]
的开头添加00
。 这是预期的输出:
Array(
[0] => Array
(
[id] => 001
[visibility] => 0
)
[2] => Array
(
[id] => 2
[visibility] => 1
)
[3] => Array
(
[id] => 003
[visibility] => 0
)
)
我怎样才能做到这一点?
我可以这样检查visibility
的值:
foreach ($var as $item) {
if ($item['visibility'] == 0) {
// I need to append two zero before the number of its id
}
}
您开始foreach
并更正了条件检查,但未在其中编写任何代码。 检查以下:-
<?php
foreach ($var as $key=> $item) {
if ($item['visibility'] == 0) { // if visibility is 0
$var[$key]['id'] = "00". $var[$key]['id']; // add 00 to corresponding id in the original array
}
}
echo "<pre/>";print_r($var);
?>
稍微容易引用$item
并进行更改:
foreach ($var as &$item) {
if ($item['visibility'] == 0) {
$item['id'] = "00{$item['id']}";
}
}
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