How to determine whether the data table exists in the database in Yii
Dec 17, 2019 pm 05:10 PM
The judgment method is divided into two steps:
The first step: Find all the table names in the database. The table names are obtained as two-dimensional arrays.
Step 2: Determine whether the table name exists in the two-dimensional array.
Code example:
$table_name =‘table’;
$juge = $handle->createCommand("show tables ")->queryAll();
//下面的deep_in_array()方法是自己寫(xiě)的方法，判斷是否存在值是否存在二維數(shù)組中，yii2中調(diào)用本類方法，可以去掉action
$cun = $this->deep_in_array($table_name,$juge);
if(!$cun){
echo json_encode("nodata");
return;
}//判斷二維數(shù)組是否存在值
public function deep_in_array($value, $array) {
foreach($array as $item) {
if(!is_array($item)) {
if ($item == $value) {
return true;
} else {
continue;
}
}
if(in_array($value, $item)) {
return true;
} else if($this->deep_in_array($value, $item)) {
return true;
}
}
return false;
}Recommended related articles and tutorials: yii tutorial
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