Problème Parse error: syntax error, unexpected

<?php

extract( shortcode_atts( array(
            'title' => '',
            'email' => get_bloginfo( 'admin_email' ),
            'style' => 'classic',
            'skin' => 'dark',
            'skin_color' => '',
            'btn_text_color' => '',
            'btn_hover_text_color' => '',
            'phone' => 'true',
            'captcha' => 'true',
            'el_class' => '',
        ), atts ) );




id = uniqid();
tabindex_1 = id;
name_str = esc_html__( 'FULL NAME ', 'pacz' );
email_str = esc_html__( 'EMAIL', 'pacz' );
submit_str = esc_html__( 'SUBMIT', 'pacz' );
content_str = esc_html__( 'SHORT MESSAGE', 'pacz' );
phone_str = esc_html__( 'YOUR PHONE NUMBER', 'pacz' );
enter_captcha = esc_html__( 'Enter Captcha', 'pacz' );
not_readable = esc_html__( 'Not readable?', 'pacz' );
change_text= esc_html__( 'Change text.', 'pacz' );

icon_user = style == 'classic' ? '<i class="pacz-icon-user"></i>' : '';
icon_email = style == 'classic' ? '<i class="pacz-icon-envelope-o"></i>' : '';
icon_phone = style == 'classic' ? '<i class="pacz-theme-icon-phone"></i>' : '';
icon_lock= style == 'classic' ? '<i class="pacz-li-lock"></i>' : '';

email = antispambot(email);
output = skin_style = "";

// Get global JSON contructor object for styles and create local variable
global classiadspro_dynamic_styles;
classiadspro_styles = '';

if ( style == 'modern' ) {
    classiadspro_styles .= '
        #contact-form-'.id.' .text-input,
        #contact-form-'.id.' .pacz-textarea,
        #contact-form-'.id.' .pacz-button{
            border-color:'.skin_color.';
        }
        #contact-form-'.id.' .text-input,
        #contact-form-'.id.' .pacz-textarea{
            color:'.skin_color.';
        }
        #contact-form-'.id.' .text-input::-webkit-input-placeholder,
        #contact-form-'.id.' .pacz-textarea::-webkit-input-placeholder,
        #contact-form-'.id.' .text-input:-moz-placeholder,
        #contact-form-'.id.' .pacz-textarea:-moz-placeholder,
        #contact-form-'.id.' .text-input::-moz-placeholder,
        #contact-form-'.id.' .pacz-textarea::-moz-placeholder,
        #contact-form-'.id.' .text-input:-ms-input-placeholder,
        #contact-form-'.id.' .pacz-textarea:-ms-input-placeholder{
            color:'.skin_color.';
        }
        #contact-form-'.id.' .pacz-button{
            color:'.btn_text_color.' !important;
        }
        #contact-form-'.id.' .pacz-button:hover{
            background-color:'.skin_color.';
            color:'.btn_hover_text_color.' !important;
        }
        #contact-form-'.id.' .captcha-change-image {
            color:'.skin_color.';
        }
        ';
}

skin_style .= (style == 'modern') ? '' : skin.'-skin ';

output .= '<div id="contact-form-'.id.'" class="pacz-contact-form-wrapper classic-style dark-skin '.el_class.'">';
output .= '    <form class="pacz-contact-form three-column" method="post" novalidate="novalidate">';
output .= '        <div class="pacz-form-row">
                        <input placeholder="'.name_str.'" type="text" required="required" name="contact_name" class="text-input" value="" tabindex="'.tabindex_1.'" />
      '.icon_user.'
                    </div>';
output .= '        <div class="pacz-form-row">
                        
                        <input placeholder="'.email_str.'" type="email" required="required" name="contact_email" class="text-input" value="" tabindex="'.tabindex_2.'" />
      '.icon_email.'
                        </div>';
if(phone == 'true'){
output .= '        <div class="pacz-form-row">
                        
                        <input placeholder="'.phone_str.'" type="text" name="contact_phone" class="text-input" value="" tabindex="'.tabindex_3.'" />
      '.icon_phone.'
      </div>';
}
output .= '        <div class="pacz-form-textarea-wrap">
                        <textarea required="required" placeholder="'.content_str.'" name="contact_content" class="pacz-textarea" tabindex="'.tabindex_4.'"></textarea></div>';



// CAPTCHA 
if(captcha == 'true') {
 
output .= '<div class="pacz-form-row">
                '.icon_lock.'
                <input placeholder="'.enter_captcha.'" type="text" name="captcha" class="captcha-form text-input full" required="required" autocomplete="off" />
                    <img src="' . plugins_url( 'captcha/captcha.php', dirname(__FILE__) ) . '" class="captcha-image" alt="captcha txt"> 
                    <a href="#" class="captcha-change-image">'.not_readable.' '.change_text.'</a>
            </div>';
}    

output .= '        <div class="button-row">
                        <button tabindex="'.tabindex_5.'" class="pacz-progress-button pacz-button  outline-button medium" data-style="move-up">
                            <span class="pacz-progress-button-content">'.submit_str.'</span>
                            <span class="pacz-progress">
                                <span class="pacz-progress-inner"></span>
                            </span>
                            <span class="state-success"><i class="pacz-icon-check"></i></span>
                            <span class="state-error"><i class="pacz-icon-times"></i></span>
                        </button>
                    </div>';
output .= '        <i class="pacz-contact-loading pacz-icon-refresh"></i>';
output .= '        <i class="pacz-contact-success pacz-theme-icon-tick"></i>';
output .= '        <input type="hidden" value="'.email.'" name="contact_to"/>';
output .= '    </form>';
output .= '    <div class="clearboth"></div>';
output .= '</div>';

echo '<div>'.output.'</div>';


// Hidden styles node for head injection after page load through ajax
echo '<div id="ajax-'.id.'" class="pacz-dynamic-styles">';
echo '<!-- ' . pacz_clean_dynamic_styles(classiadspro_styles) . '-->';
echo '</div>';


// Export styles to json for faster page load
classiadspro_dynamic_styles[] = array(
  'id' => 'ajax-'.id ,
  'inject' => classiadspro_styles
);