<?php
$xml = <<< EOF
<students>
<student>
<firstname>John</firstname>
<lasttname>Snow</lasttname>
<student_id>160600</student_id>
<gender>male</gender>
<dob>23-06-95</dob>
<age>21</age>
<email>JohnSnow@gmail.com</email>
<mobilenumber>57675060</mobilenumber>
<address>Winter Fel</address>
<cohort>BSE15PT</cohort>
<programme>Software Engineering</programme>
<mode>PT</mode>
</student>
<student>
<firstname>meryl</firstname>
<lastname>Burton</lastname>
<student_id>150500</student_id>
<gender>female</gender>
<dob>26-07-95</dob>
<email>mirena@gmail.com</email>
<mobilenumber>57800603</mobilenumber>
<address>rose hill</address>
<cohort>BSE15AFT</cohort>
<programme>software engineering</programme>
<mode>ft</mode>
</student>
</students>
EOF;
$names = $xml->xpath("/students/student[firstname = 'meryl']");
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