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@ 2015-10-05T19:20:30Z

<?php

$sentences = [
    'India is great country.',
    'Indiana is great state.',
    'I have worked in India.',
    'India-based research.',
    'India78 is not very strong password.'
];
$search = "India";
foreach ($sentences as $sentence) {
    var_dump(preg_match("/\b$search\b/i", $sentence));
}

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive preview

49.4 ms | 402 KiB | 5 Q