Laravel检查列的存在

代码示例

laravel降列如果存在的话

if (Schema::hasColumn('users', 'phone')) {
 	Schema::table('users', function (Blueprint $table){
       $table->dropColumn('phone');
    });
}

laravel检查表已列

if (Schema::hasTable('users')) {
    // The "users" table exists...
}

if (Schema::hasColumn('users', 'email')) {
    // The "users" table exists and has an "email" column...
}

laravel移民检查表已列

// You may check for the existence of a table or column
// using the hasTable and hasColumn methods:

if (Schema::hasTable('users')) {
    // The "users" table exists...
}

if (Schema::hasColumn('users', 'email')) {
    // The "users" table exists and has an "email" column...
}

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带有示例的类似页面

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