WordPress Actions Repeated Problems

[hlaporthein]

I have difficulties in using wordpress actions. I would like to send an email and do other stuff when user is viewing each single post.

But, when I use wordpress <b>init or the_post</b> action to send an email, email is sending two times. I have also tested with <b>template_redirect</b> or other actions but it is still going two times.

I googled it and saw this one Avoiding_infinite_loops. But, it doesn’t work for me. Please help me how I could be able to do <b> wordpress action repeat problem</b>.

To understand what I said above. I created a simple code and it would create test.txt file in your theme directory and you could see each time we reload the page, it is saying twice in test.txt file. I also shared below codes on codeshare

class ZB_API_WORKER {

    public function init() {
        add_action( 'the_post', array( $this, 'send_single_page_data' ), 100 );
    }


    /**
     * @return bool
     *
     * @description Sending data when user view in single page
     */
    public function send_single_page_data() {
        global $post;

//      remove_action( 'the_post', array( $this, 'send_single_page_data' ), 0 );
        if ( is_single() ) {
            $this->unit_test();
        }

    }


    public
    function send_mail() {
        $to      = '[email protected]';
        $headers = array( 'Content-Type: text/html; charset=UTF-8' );
        wp_mail( $to, $this->mail_subject, $this->mail_message, $headers );
    }


    /**
     * @param $lorem_text_demo
     *
     * @description This is testing file write system
     */
    public function unit_test( $lorem_text_demo = '' ) {
        $file_url = get_stylesheet_directory() . '/test.txt';
        $file_write_text = fopen( $file_url, 'a' ) or die( 'unable to open it' );
        $lorem_text = $lorem_text_demo;
        $process_box = date("h:i:sa") ."\n"."---------------------";
        $file_write = fwrite( $file_write_text, "\n". $process_box );
        fclose( $file_write_text );
    }

}

$api_class = new ZB_API_WORKER();
$api_class->init();

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