Having trouble with get_option tag

var_dump($msg) returns false. What you are doing does not set $msg to “hello_world”.

Nothing to say if I type $msg = ‘hello_wordld’; I only want to know more about get_option tag. Thanks ??

I just told you about the get_option(...) function. If there is no ‘hello_world’ key in the wp_options table, the function returns false. It does not “push value to variable”, though it looks like you can use a second parameter for that.

https://codex.www.ads-software.com/Function_Reference/get_option

Updating key in wp_options is developer job (not client). In some themes, it’s used to check conditional. Ex:

function version_init() {

    $framework_version = '1.0';

    if ( get_option( 'framework_version' ) != $framework_version ) {
    update_option('framework_version', $framework_version );
    }
}

Why they can compare get_option(‘framework_version’) with another value while framework_version key don’t exist in wp_options table.

Like I said, get_option(...) will return false if the key doesn’t exist. false does not equal any value that $framework_version might be (except false and 0), therefore the conditional as a whole is true and update_option runs.

The result is that the first time this runs, it will insert the ‘framework_version’ into wp_options. After that it will simply update ‘framework_version’.

I had received enthusiasm help from you, thanks so much!