Yii custom rules, parameter passing

{Code ...} in the last rule, I want to pass the pid and cat_name as parameters to the custom checkCategoryName ($ attribute, $ params), but it seems that only constants such as pid1 can be passed, but why can't I pass the cat_name variable?

Return [['cat _ name', 'unit ', 'pid', 'sort ', 'is _ show', 'price _ region'], 'requestred',], [['pid', 'sort ', 'is _ show', 'price _ region'], 'integer'], [['cat _ name'], 'string', 'Max' => 30], [['unit '], 'string', 'Max' => 10], [['des'], 'string', 'Max' => 100], [['cat _ name'], 'checkcategoryname ', 'params' => ['pid '=> '1', 'catgoryname' => 'cat _ name'], // verify that the category name is legal (the category name cannot be repeated at the same level)];

In the last rule, I want to pass the pid and cat_name as parameters to the custom checkCategoryName ($ attribute, $ params,
But it seems that only constants such as pid = 1 can be passed, but why can't I pass the cat_name variable?

Reply content:

Return [['cat _ name', 'unit ', 'pid', 'sort ', 'is _ show', 'price _ region'], 'requestred',], [['pid', 'sort ', 'is _ show', 'price _ region'], 'integer'], [['cat _ name'], 'string', 'Max' => 30], [['unit '], 'string', 'Max' => 10], [['des'], 'string', 'Max' => 100], [['cat _ name'], 'checkcategoryname ', 'params' => ['pid '=> '1', 'catgoryname' => 'cat _ name'], // verify that the category name is legal (the category name cannot be repeated at the same level)];

In the last rule, I want to pass the pid and cat_name as parameters to the custom checkCategoryName ($ attribute, $ params,
But it seems that only constants such as pid = 1 can be passed, but why can't I pass the cat_name variable?

Inline validator can be accessed directly in the method:

function checkCategoryName($attribute, $params) {    $pid = $this->pid;}