CODEWITHSUNDEEP
phpwordpress
Reza Saadati
Reza Saadati

Reputation: 5429

How to run a code for all functions in the same class?

This is how my code looks like:

public function __construct() {
    global $wpdb;
}

private function get_pagination() {
    $user_count = $wpdb->get_var( "SELECT COUNT(*) FROM yc_customers WHERE $this->get_where" );
}

When I run it, I'll get this error:

Fatal error: Call to a member function get_var() on a non-object

When I copy global $wpdb; to my get_pagination() function, then I don't get any errors. I don't want to copy it in all my functions though. Why am I getting this error, even when I have the global $wpdb in the __construct function?

Upvotes: 0

Views: 34

Answers (1)

Federkun
Federkun

Reputation: 36954

If you want use global, and you don't want it, then you can do something like:

private function get_pagination() {
    global $wpdb;
    $user_count = $wpdb->get_var( "SELECT COUNT(*) FROM yc_customers WHERE $this->get_where" );
}

But you can simply pass the variable in the constructor, like: 

public function __construct($wpdb) {
    $this->wpdb = $wpdb;
}

private function get_pagination() {
    $user_count = $this->wpdb->get_var( "SELECT COUNT(*) FROM yc_customers WHERE $this->get_where" );
}

Look for "dependency injection".

Upvotes: 1

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