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PHP How to check if MySQL result contains value
$getfreq = mysql_query("SELECT wp_term_relationships.term_taxonomy_id FROM wp_term_relationships WHERE wp_term_relationships.object_id = '1737'");

if (in_array(569,$getfreq,TRUE) {
    echo "Success!";
} else if (in_array(654,$getfreq,TRUE) {
    echo "Not good";
} else {
    echo "Failure";
}

print_r($getfreq);

$res = mysql_fetch_array($getfreq);

if (in_array(569,$res,TRUE) {....

while ( false !== ($row = mysql_fetch_assoc($getfreq))) {
   // make your comparison for each row
}

while ($row = mysql_fetch_assoc($getfreq)) {
    if ($row[term_taxonomy_id] == 345) {
        echo "WORKS!";
    }
}