<?php

$text = <<<EOT
            [if not lastProvision.network_id = 25]
                                        <label class="col-xs-4 control-label" for="productSelect">Choose tariff <span class="astrisk">*</span>
                                            <select id="product" class="form-control" name="product" required="" alwaysshow="1" type="productSelect">
                                                <option value="Mr">Mr</option>
                                                <option value="Miss">Miss</option>
                                                <option value="Mrs">Mrs</option>
                                            </select>
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label class="col-xs-4 control-label" for="title">Title <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <select id="title" class="form-control" name="title" required="" alwaysshow="1">
                                                <option value="Mr">Mr</option>
                                                <option value="Miss">Miss</option>
                                                <option value="Mrs">Mrs</option>
                                                <option value="Ms">Ms</option>
                                                <option value="Dr">Dr</option>
                                            </select>
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="first-name" class="control-label col-xs-4">First Name <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="first-name" id="first-name" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="last-name" class="control-label col-xs-4">Surname <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="last-name" id="last-name" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="email" class="control-label col-xs-4">Email <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="email" id="email" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                </div>
                                <div class="col-sm-6" data-element-group="datafields">
                                    <div class="form-group" data-element="datafield">
                                        <label for="address-1" class="control-label col-xs-4">Address 1 <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="address-1" id="address-1" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="address-2" class="control-label col-xs-4">Address 2 <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="address-2" id="address-2" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="city" class="control-label col-xs-4">City <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="city" id="city" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                    <div class="form-group" data-element="datafield">
                                        <label for="postcode" class="control-label col-xs-4">Postcode <span class="astrisk">*</span>
                                        </label>
                                        <div class="col-xs-8">
                                            <input name="postcode" id="postcode" class="form-control" placeholder="" required="required" alwaysshow="1" type="text">
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div class="form-group">
                                <p class="col-sm-12 text-center">
                                    <small data-component="multiline" id="c-mul-form-tnc">By using this service, you agree to the <u><a href="#">terms &amp; conditions</a></u> and <u><a href="#">privacy policy</a></u></small>
                                </p>
                            </div>
                            <div class="form-group">
                                <div class="col-sm-12 text-center">
                                    <button class="btn text-uppercase btn-submit" type="submit">Submit
                                    </button>
                                </div>
                            </div>
                    </div>
                </div>
            </div>



</div>
        <div id="footer" class="footer row">
            <div class="col-xs-12 text-center">
                <div class="footnav">
                    <ul class="footer-info">
                        <li>
                            <strong>Your Device ID:<span>[device.mac.raw]</span></strong>
                        </li>
                        <li>AaBylyns zxcz a is provided by our partner</li>
                    </ul>
                    </div>
                    <div id="btn-home">
                        <a id="" href="/default">
                            <span class="button-home">
                                <strong>Home</strong>
                            </span>
                        </a>
                    </div>
                    <ul class="list-inline footextra hidden-md hidden-lg">
                        <li>Customer Services:
                            <span>[network.support_phone]</span>
                        </li>
                    </ul>
                    <ul class="list-inline footextra">
                        <li class="hidden-xs hidden-sm">Customer Services: <span>[network.support_phone]</span>
                        </li>
                        <li class="hidden-xs hidden-sm">|</li>
                        <li>
                            <a href="/roaming">Roaming partners</a>
                        </li>
                        <li>|</li>
                        <li>
                            <a href="/faqs">FAQs</a>
                        </li>
                    </ul>
                </div>
            </div>
        </div>
        [endif]
    some text
EOT;

preg_match_all(
    '/\[(if) ([^\]]*)\]
    ((?:(?!\[if).|(?R))*?)
    \[endif\]/sx',
    $text,
    $matches
);

var_dump($matches);