$re = '/{generic_page_slideshow((?::\S+?)?)(\s.*?)?}(.*?){\/generic_page_slideshow\1}/s';
$str = '
{!-- ra:0000000019ecdbb0000000005dbc5212 --}
{layout:set name="title"}{title}{/layout:set}
{layout:set name="entry_id"}{entry_id}{/layout:set}
{layout:set name="body_class"}{generic_page_theme}{/layout:set}
{!-- ra:0000000019ecdbf4000000005dbc5212 --}{if {generic_page_slideshow:total_rows} > 0}
<div class="row">
<div class="carousel overlay-nav">
<div data-navigation="nav-carousel1" data-crsl="[{"visible": 1, "itemMinWidth": 300, "itemMargin": 0}]" class="crsl-items">
<div class="crsl-wrap">
{generic_page_slideshow}
<figure class="crsl-item">
<img src="{generic_page_slideshow:image}">
<figcaption class="crsl-caption">
<p class="close">{generic_page_slideshow:caption}</p>
</figcaption>
</figure>
{/generic_page_slideshow}
</div>
</div>
<div id="nav-carousel1" class="crsl-nav">
<div class="crsl-nav-helper"><a href="#" class="previous"><i class="icon-carat-l eft"></i><span> Previous</span></a><a href="#" class="next"><span>Next </span><i class="icon-carat"></i></a></div>
</div>
</div>
</div>
<hr class="block-spacer">
{/if}
<!-- Page Overview with optional Sidebar -->
{generic_page_overview_1}
<header id="page-header" class="row research-header-heightmatch columned">
<div class="columns {!-- ra:0000000019ecdb18000000005dbc5212 --}{if {generic_page_overview_1_links:total_rows} > 0}large-8{if:else}large-12{/if} default-padding">
<h2>{generic_page_overview_1:text}</h2>
{!-- ra:0000000019ecdb26000000005dbc5212 --}{if generic_page_overview_1:link_text != \'\'}
<h3 class="white-icons"><a href="{generic_page_overview_1:link_url}" class="button">{generic_page_overview_1:link_text} <i class="icon-carat"></i></a></h3>
{/if}
</div>
{!-- ra:0000000019ecdb32000000005dbc5212 --}{if {generic_page_overview_1_links:total_rows} > 0}
<div class="columns large-4 triangle-tiles research-header-heightmatch">
<h 3 class="bold">{generic_page_overview_1:side_bar_text}</h3>
<ul class="close white-links white-icons text-lightweight loose-list-less">
{/if}
{/generic_page_overview_1}
{!-- ra:0000000019ecdb5e000000005dbc5212 --}{if {generic_page_overview_1:total_rows} > 0}
{!-- ra:0000000019ecdb52000000005dbc5212 --}{if {generic_page_overview_1_links:total_rows} > 0}
{generic_page_overview_1_links}
<li><a href="{generic_page_overview_1_links:link_url}"><i class="{generic_page_overview_1 _links:icon} scaleup"></i> {generic_page_overview_1_links:link_text}</a></li>
{/generic_page_overview_1_links}
</ul>
</div>
{/if}
</header>
<hr class="block-spacer">
{/if}
<!-- Grey triangle box with optional picture. -->
{generic_page_overview_2}
<div class="row">
<div class="triangle-tiles">
<div class="row">
<div class="columns {!-- ra:0000000019ecdb72000000005dbc5212 --}{if generic_page_overview_2:image != \'\' OR generic_page_overview_2:media_url != \'\'}larg e-6{if:else}large-12{/if}">
{!-- ra:0000000019ecda96000000005dbc5212 --}{if generic_page_overview_2:title_url != \'\'}
<h2><a href="{generic_page_overview_2:title_url}">{generic_page_overview_2:title}</a></h2>
{if:else}
<h2>{generic_page_overview_2:title}</h2>
{/if}
<h3>{generic_page_overview_2:text}</h3>
<ul class="link-on-dark-icons">
{/generic_page_overview_2}
{!-- ra:0000000019ecdab4000000005dbc5212 --}{if {generic_page_overview_2:total_rows} > 0}
{!-- ra:0000000019ecdac8000000005dbc5212 --}{if {generic_page_overview_2_links:total_rows} > 0}
{generic_page_overview_2_links}
<li><a href="{generic_page_overview_2_links:link_url}">{generic_page_overview_2_links:link_text} <i class="icon-carat"></i></a></li>
{/generic_page_overview_2_links}
{/if}
</ul>
</div>
{generic_page_overview_2}
{!-- ra:0000000019ecdad2000000005dbc5212 --}{if generic_page_overview_2:image != \'\'}
<div class="columns large-6 "><img src="{generic_page_overview_2:image}"></div>
{!-- ra:0000000019ecdae0000000005dbc5212 --}{if:elseif generic_page_overview_2:media_url != \'\'}
<div class="columns large-6">
</div>
{/if}
{/generic_page_overview_2}
</div>
</div>
</div>
<!--hr class="block-spacer"-->
{/if}
<!-- stick navigation-->
{!-- ra:0000000019ecda3c000000005dbc5212 --}{if {generic_page_body:total_rows} > 1}
<div class="sticky-wrapper sticky-horizontal">
<div class="row">
{exp:vbi_utils:get_calcu_pair num_items=\'{generic_page_body:total_rows}\'}
{!-- ra:0000000019ecda32000000005dbc5212 --}{if {row1_space_col} > 0}
<div class="columns large-{row1_space_col} medium-{row1_space_col} small-12"> </div>
{/if}
{generic_page_body}
{!-- ra:0000000019ecda5e000000005dbc5212 --}{if {generic_page_body:field_row_count} <= {limit_number}}
<div class="columns large-{row_col_1} medium-{row_col_1} small-12 {!-- ra:0000000019ecda6c000000005dbc5212 --}{if {generic_page_body:count} == {limit_number}}end{/if}"><a href="#{exp:vbi_utils:url_friendly value=\'{generic_page_body:menu_title}\'}" class="smoothScroll"><i class="{generic_page_body:icon}"></i>{generic_page_body:menu_title}</a></div>
{/if}
{/generic_page_body}
{!-- ra:0000000019ecda70000000005dbc5212 --}{i f {row1_space_col} > 0}
<div class="columns large-{row1_space_col} medium-{row1_space_col} small-12"> </div>
{/if}
</div>
<div class="row">
{!-- ra:0000000019ecd982000000005dbc5212 --}{if {row2_space_col} > 0}
<div class="columns large-{row2_space_col} medium-{row2_space_col} small-12"> </div>
{/if}
{generic_page_body}
{!-- ra:000000 0019ecd9ae000000005dbc5212 --}{if {generic_page_body:field_row_count} > {limit_number}}
<div class="columns large-{row_col_2} medium-{row_col_2} small-12 {!-- ra:0000000019ecd9bc000000005dbc5212 --}{if {generic_page_body:count} == {generic_page_body:total_rows}}end{/if}"><a href="#{exp:vbi_utils:url_friendly value=\'{generic_page_body:menu_title}\'}" class="smoothScroll"><i class="{generic_page_body:icon}"></i>{generic_page_body:menu_title}</a></div>
{/i f}
{/generic_page_body}
{!-- ra:0000000019ecd9c0000000005dbc5212 --}{if {row2_space_col} > 0}
<div class="columns large-{row2_space_col} medium-{row2_space_col} small-12"> </div>
{/if}
{/exp:vbi_utils:get_calcu_pair}
</div>
</div>
{/if}
<!-- Grid Gallery -->
{!-- ra:0000000019ecd9e8000000005dbc5212 --}{if {generic_page_gallery:total_rows} > 0 || generic_page_gallery_intr o != \'\'}
<div class="row">
<div class="block-white">
<div class="row">
<div class="columns large-12 medium-12 small-12">
{generic_page_gallery_intro}
</div>
</div>
<div class="row">
<div class="columns large-12 medium-12 small-12">
<ul class="large-block-grid-3">
{generic_page_gallery}
<li>
{!-- ra:0000000019ecd9f0000000005dbc5212 --}{if generic_page_gallery:image != \'\'}
<a href="{generic_page_gallery:link_url}"><img c lass="close2x-precise" src="{generic_page_gallery:image}"></a>
{!-- ra:0000000019ecd900000000005dbc5212 --}{if:elseif generic_page_gallery:media_type == \'Image\'}
<a href="{generic_page_gallery:link_url}"><img class="close2x-precise" src="{generic_page_gallery:media_url}"></a>
{!-- ra:0000000019ecd910000000005dbc5212 --}{if:elseif generic_page_gallery:media_type == \'YouTube\'}
<iframe src="{generic_page_gallery:media_url}" frameborder="0" allowfullscreen></ifr ame>
{!-- ra:0000000019ecd926000000005dbc5212 --}{if:elseif generic_page_gallery:media_type == \'Slideshare\'}
<iframe src="{generic_page_gallery:media_url}" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:1px solid #CCC; border-width:1px; margin-bottom:5px; max-width: 100%;" allowfullscreen></iframe>
{/if}
<h3 class="close2x-precise"><a href="{generic_page_gallery:link_url}">{generic_page_gallery:link_text}</a></h3>
<p>{g eneric_page_gallery:text}</p>
</li>
{/generic_page_gallery}
</ul>
</div>
</div>
</div>
</div>
{/if}
{layout:preBodyContent}
{!-- ra:0000000019ecd946000000005dbc5212 --}{if {generic_page_body:total_rows} > 0}
<div class="row">
<div class="block-white flush-left {!-- ra:0000000019ecd95a000000005dbc5212 --}{if {generic_page_body:total_rows} == 1 && {generic_page_body_sidebars:total_rows search:alignment=\'left\'} == 0}block-white-content{/if}">
<div class="row {!-- ra:0000000019ecd962000000005dbc5212 --}{if {generic_page_body:total_rows} == 1 && {generic_page_body_sidebars:total_rows search:alignment=\'left\'} == 0}row-content{/if}">
{!-- ra:0000000019ecd88a000000005dbc5212 --}{if {generic_page_body_sidebars:total_rows search:alignment="left"} > 0}
<div class="columns {!-- ra:0000000019ecd89e000000005dbc5212 --}{if {generic_page_body_sidebars:total_rows search:alignment="right"} > 0}large-3 medium-3{if:else}large-4 medium-4{/if} small-12">
<div class="sidebar">
{generic_page_body_sidebars search:alignment="left"}
{!-- ra:0000000019ecd8a4000000005dbc5212 --}{if {generic_page_body_sidebars:count} > 1}
<hr class="split-sidebar">
{/if}
<h3><i class="{generic_page_body_sidebars:icon}"></i> {generic_page_body_sidebars:header}</h3>
{generic_page_body_sidebars:content}
{/generic_page_body_sidebars}
</div>
</div>
{/if}
<div class="columns {!-- ra:0000000019ecd8c8000000005dbc5212 --}{if {generic_page_body_sidebars:total_rows search:alignment=\'left\'} > 0 && {generic_page_body_sidebars:total_rows search:alignment=\'right\'} > 0}large-6 medium-6{!-- ra:0000000019ecd8d4000000005dbc5212 --}{if:elseif {generic_page_body_sidebars:total_rows search:alignment=\'left\'} > 0 || {generic_page_body_sidebars:total_rows search:alignment=\'right\'} > 0}large-8 medium-8{if:else}large-12 medium-12{/if} small-12">
{generic_page_body}
<div id="{exp:vbi_utils:url_friendly value=\'{generic_page_body:menu_title}\'}" class="body-content">
{!-- ra:0000000019ecd8f6000000005dbc5212 --}{if generic_page_body:content_title != \'\'}
<header class="section-subheader">
<h2> {generic_page_body:content_title}</h2>
</header>
{/if}
{!-- ra:0000000019ecd800000000005dbc5212 --}{if generic_page_body:body_template != \'\'}
{embed="{generic_page_body:body_template}"}
{/if}
{generic_page_body:content}
</div>
{/generic_page_body}
{!-- ra:0000000019ecd828000000005dbc5212 --}{if {generic_page_body:total_rows} > 1}
<p><a href="#main-header" class="smoothScroll"><i class="icon icon-carat-up"></i> Back to top</a></p>
{/if}
</div>
{!-- ra:0000000019ecd838000000005dbc5212 --}{if {generic_page_body_sidebars:total_rows search:alignment="right"} > 0}
<div class="columns {!-- ra:0000000019ecd84c000000005dbc5212 --}{if {generic _page_body_sidebars:total_rows search:alignment="left"} > 0}large-3 medium-3{if:else}large-4 medium-4{/if} small-12">
{generic_page_body_sidebars search:alignment="right"}
<div class="sidebar news-sidebar-list round-left space-below">
<header>
<h5><i class="{generic_page_body_sidebars:icon}"></i> {generic_page_body_sidebars:header}</h5>
</header>
{generic_page_body_sidebars:content}
</div>
{/generic_page_body_sidebars}
</di v>
{/if}
</div>
</div>
</div>
{/if}
{generic_page_bottom_link}
<div class="row triangle-tiles text-center">
<p class="close link-on-dark-icons">
<a href="{generic_page_bottom_link:link_url}">{generic_page_bottom_link:link_text} <i class="icon-carat"></i></a>
</p>
</div>
{/generic_page_bottom_link}
';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php