getGenes.php
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	<?php
	// case sensitive % stands for .*
	//select *
	//from shrine_ont.gene_values
	//where gene_value LIKE '%A1%' //
	//LIMIT 20

	// case insensitive with regex
	//select *
	//from shrine_ont.gene_values
	//where gene_value ~* '.a1.'
	//LIMIT 20

	//$conn = pg_connect("host=localhost port=5432 dbname=i2b2 user=postgres password=admin");
	$conn = pg_connect("host=localhost port=5432 dbname=i2b2 user=shrine_ont password=demouser");

	if (!$conn) {
	echo "Error while connecting to the postgres database";
	exit;
	}

	// get the row which contains all the values of the passed annotation
	$query =
	"SELECT gene_value
	FROM shrine_ont.gene_values
	WHERE gene_value ~* '." . $_GET["gene"] .".'
	LIMIT " . $_GET["limit"];

	$result = pg_query($conn, $query);
	if (!$result) {
	echo "An error occurred.\n";
	exit;
	}

	// In json format return the list of genes
	$geneList = "";
	while ($row = pg_fetch_row($result)) {
	$geneList .= "\"$row[0]\",";
	}
	// drop the last comma and concatenate in json format
	echo "[" . substr($geneList, 0, -1) . "]";