外键在laravel 5.4中显示语法错误[重复]

Question

This question already has an answer here:

• PHP parse/syntax errors; and how to solve them? 17 answers

I have created migration file in that i have written :

public function up()
{
        //
        Schema::create('ad_group', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('campaign_id')->unsigned();
            $table->char('name',32);
});
        Schema::table('ad_group',function (Blueprint $table){
            $table->foreign('campaign_id')->references->('id')->on('campaigns');
});
}

which returns error like this :

[Symfony\Component\Debug\Exception\FatalThrowableError]
Parse error: syntax error, unexpected '(', expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$'

</div>

Answer 1

Your mistake is  "->references->('id')->" must be "->references('id')->"
 
public function up() {
    Schema::table('ad_group', function (Blueprint $table) {
          $table->foreign('campaign_id')->references('id')->on('campaigns');
});
}

Hope it help :)