PHP Syntax Error: Extra Curly Bracket in Echo Statement

The following PHP code snippet contains a syntax error due to an extra closing curly bracket after the echo statement:

<?php
if($sliding_img) {
    echo 'style='background-image:url('. $sliding_img .');';
}
?>

The corrected syntax would be:

<?php
if($sliding_img) {
    echo 'style='background-image:url('. $sliding_img .');'';
}
?>

The issue lies in the extra closing curly bracket } after the closing parenthesis ) of the echo statement. This extra curly bracket should be removed to fix the syntax error.