如何在 php 中的数组中替换特定键的值?
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/8199011/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How can I replace a specific key's value in an array in php?
提问by zeckdude
I have a an array that has 3 values. After the user pushes the submit button I want it to replace the the value of a key that I specify with another value.
我有一个包含 3 个值的数组。在用户按下提交按钮后,我希望它用另一个值替换我指定的键的值。
If I have an array with the values (0 => A, 1 => B, 2 => C)
, and the function is run, the resulting array should be (0 => A, 1 => X, 2 => C)
, if for example the parameter for the function tells it to the replace the 2nd spot in the array with a new value.
如果我有一个包含 values 的数组(0 => A, 1 => B, 2 => C)
,并且运行该函数,则结果数组应该是(0 => A, 1 => X, 2 => C)
,例如,如果函数的参数告诉它用新值替换数组中的第二个点。
How can I replace a specific key's value in an array in php?
如何在 php 中的数组中替换特定键的值?
回答by Aurelio De Rosa
If you know the key, you can do:
如果您知道密钥,则可以执行以下操作:
$array[$key] = $newVal;
If you don't, you can do:
如果你不这样做,你可以这样做:
$pos = array_search($valToReplace, $array);
if ($pos !== FALSE)
{
$array[$pos] = $newVal;
}
Note that if $valToReplace is found in $array more than once, the first matching key is returned. More about array_search.
请注意,如果在 $array 中多次找到 $valToReplace,则返回第一个匹配的键。更多关于array_search。