Fix false positives when checking for an existing keyword

Resolves #234.

inc/database/mysql.php

@@ -107,7 +107,9 @@ function keywordByText($text) {
 	$result = mysql_query("SELECT * FROM `" . TINYIB_DBKEYWORDS . "` WHERE `text` = '" . mysql_real_escape_string($text) . "'");
 	if ($result) {
 		while ($keyword = mysql_fetch_assoc($result)) {
-			return $keyword;
+			if ($keyword['text'] === $text) {
+				return $keyword;
+			}
 		}
 	}
 	return array();

inc/database/mysqli.php

@@ -124,7 +124,9 @@ function keywordByText($text) {
 	$result = mysqli_query($link, "SELECT * FROM `" . TINYIB_DBKEYWORDS . "` WHERE `text` = '" . mysqli_real_escape_string($link, $text) . "'");
 	if ($result) {
 		while ($keyword = mysqli_fetch_assoc($result)) {
-			return $keyword;
+			if ($keyword['text'] === $text) {
+				return $keyword;
+			}
 		}
 	}
 	return array();

inc/database/pdo.php

@@ -85,12 +85,13 @@ function keywordByID($id) {
 
 function keywordByText($text) {
 	$text = strtolower($text);
-	$keywords = array();
 	$results = pdoQuery("SELECT * FROM " . TINYIB_DBKEYWORDS . " WHERE text = ?", array($text));
-	while ($row = $results->fetch(PDO::FETCH_ASSOC)) {
-		$keywords[] = $row;
+	while ($keyword = $results->fetch(PDO::FETCH_ASSOC)) {
+		if ($keyword['text'] === $text) {
+			return $keyword;
+		}
 	}
-	return $keywords;
+	return array();
 }
 
 function allKeywords() {

inc/database/sqlite.php

@@ -93,7 +93,9 @@ function keywordByText($text) {
 	$text = strtolower($text);
 	$result = sqlite_fetch_all(sqlite_query($GLOBALS["db"], "SELECT * FROM " . TINYIB_DBKEYWORDS . " WHERE text = '" . sqlite_escape_string($text) . "'"), SQLITE_ASSOC);
 	foreach ($result as $keyword) {
-		return $keyword;
+		if ($keyword['text'] === $text) {
+			return $keyword;
+		}
 	}
 	return array();
 }

inc/database/sqlite3.php

@@ -108,7 +108,9 @@ function keywordByText($text) {
 	$text = strtolower($text);
 	$result = $db->query("SELECT * FROM " . TINYIB_DBKEYWORDS . " WHERE text = '" . $db->escapeString($text) . "'");
 	while ($keyword = $result->fetchArray()) {
-		return $keyword;
+		if ($keyword['text'] === $text) {
+			return $keyword;
+		}
 	}
 	return array();
 }