WordPress front end edit form with shortcode

<?php

add_shortcode( 'front_end_post_form', 'front_end_post_form' );

function front_end_post_form( $atts ) {
    ob_start();?>
 <script type="text/javascript">
jQuery(document).ready(function($) {
$('#succes').hide();
});
</script>
<?php
$postTitleError = '';
$postcontentError = '';
if(isset($_POST['submitted']) && isset($_POST['post_nonce_field']) && wp_verify_nonce($_POST['post_nonce_field'], 'post_nonce')) {
if (trim($_POST['postTitle']) === '' || $_POST['postContent'] === '' ) {
    if(trim($_POST['postTitle']) === '') {
        $postTitleError = 'Please enter a title.';
    }
    if(trim($_POST['postContent']) === '') {
        $postcontentError = 'Please enter a title.';
    }

}else{
    $post_information = array(
        'post_title' => esc_attr(strip_tags($_POST['postTitle'])),
        'post_content' => esc_attr(strip_tags($_POST['postContent'])),
        'post_status' => 'pending',
        'post_type' => 'post'
        
    );
        
    $post_id = wp_insert_post($post_information);
   // $link = get_permalink( $post_id );
    ?>
    <script type="text/javascript">
jQuery(document).ready(function($) {
$('#primaryPostForm').hide();
$('#succes').show();

});

</script>
<?php
}
} ?>
<form action="" id="primaryPostForm" method="POST" enctype="multipart/form-data">
            <fieldset>
                <label for="postTitle"><?php _e('Post Title:', 'framework') ?></label>
                <input type="text" name="postTitle" id="postTitle" value="<?php if(isset($_POST['postTitle'])) echo $_POST['postTitle'];?>" class="required" />
            </fieldset>
            <?php if($postTitleError != '') { ?>
                <span class="error"><?php echo $postTitleError; ?></span>
                <div class="clearfix"></div>
            <?php } ?>
            <fieldset>  
                <label for="postContent"><?php _e('Content:', 'framework') ?></label>
                <textarea name="postContent"> </textarea>
            </fieldset>
            <?php if($postcontentError != '') { ?>
                <span class="error"><?php echo $postcontentError; ?></span>
                <div class="clearfix"></div>
            <?php } ?>
            
            <fieldset>
                <?php wp_nonce_field('post_nonce', 'post_nonce_field'); ?>
                <input type="hidden" name="submitted" id="submitted" value="true" />
                <button type="submit"><?php _e('Submit', 'framework') ?></button>
            </fieldset>
        </form>
        <div id="succes">
            <h2>Post Title: <?php if(isset($_POST['postTitle'])) echo $_POST['postTitle'];?></h2>
            <h2>Contant: <?php if(isset($_POST['post_category'])) echo $_POST['post_category'];?></h2>
        </div>
  
<?php $myvariable = ob_get_clean();
    return $myvariable;
    }