如何使用file_put_contents（）在新的php文件中插入PHP代码？

Question

I am trying to insert some PHP code to a new PHP file. To do that I am using:

if ( $this->fblcs_how_to_show == 1 ) {


    $insert_fb_code = <<<INSERTPHPCODE
    <?php 
    global $post;
    $fblcs_permalink    =   get_the_permalink( $post );
    echo  "<div class='fb-comments fbcls-front' data-href='$fblcs_permalink' data-width='' data-numposts='5' data-mobile='true'></div>";
    INSERTPHPCODE;

    file_put_contents( plugin_dir_path( dirname( __FILE__ ) ) . '/public/partials/extra-template/comments-template.php', $insert_fb_code );
}

Now when I open that file where I insert the code it's showing me following code:

<?php 
global $post;
    =   get_the_permalink(  );
echo  "<div class='fb-comments fbcls-front' data-href='' data-width='' data-numposts='5' data-mobile='true'></div>";

you can see that It doesn't add exactly the same content!

can you tell me why and how can I fix it?

Answer 1

What is happening is that it is replacing variables with their values, instead of the names, which are not defined and therefore with no value. What you can do is:

    if ( $this->fblcs_how_to_show == 1 ) {
        $insert_fb_code = '
            <?php 
            global $post;
            $fblcs_permalink    =   get_the_permalink( $post );
            echo  "<div class=\"fb-comments fbcls-front\" data-href=\"$fblcs_permalink\" 
data-width=\"\" data-numposts=\"5\" data-mobile=\"true\"></div>";
    ';

        file_put_contents( plugin_dir_path( dirname( __FILE__ ) ) . '/public/partials/extra-template/comments-template.php', $insert_fb_code );
}