convert from flask to PHP+pgSQL (no Python)

jacksonwalters · Sep 10, 2024 · c2fce6a · c2fce6a
1 parent fc7e43f
commit c2fce6a
Showing 1 changed file with 121 additions and 0 deletions.
diff --git a/index.php b/index.php
@@ -0,0 +1,121 @@
+<?php
+    error_reporting(E_ALL);
+    ini_set('display_errors', '1');
+    //connect to a database named "jackson" on the host "localhost" with a username and password
+    $conn = pg_connect("host=localhost port=5432 dbname=jackson user=jackson password=your-password-here");
+?>
+
+<?php
+// validate user input from forms
+function validate_string($user_input,$max_len){
+    if (empty($user_input)) {
+        return false;
+    }
+    // To check that username only contains alphabets, numbers, and underscores 
+    elseif (!preg_match("/^[a-zA-Z0-9_]*$/", $user_input)) {
+        return false;
+    }
+    elseif (strlen($user_input) > $max_len) {
+        return false;
+    }
+    else{
+        return true;
+        }
+    }
+?>
+
+<form action="/" method="POST">
+        Word 1: <input type="text" id="word_1" name="word_1">
+        Word 2: <input type="text" id="word_2" name="word_2">
+        <input type="submit" value="Submit">
+    </form>
+
+<?php
+//define vector functions for PHP arrays
+function add_arrays($arr1,$arr2){
+    $n = count($arr1);
+    assert($n == count($arr2), "Error: arrays are different sizes.");
+    $sum_array = array_fill(0, $n, 0);
+    for ($i = 0; $i < $n; $i++) {
+        $sum_array[$i] = $arr1[$i] + $arr2[$i];
+    }
+    return $sum_array;
+}
+//define vector functions for PHP arrays
+function scale_array($scalar,$arr){
+    $n = count($arr);
+    $scaled_array = array_fill(0, $n, 0);
+    for ($i = 0; $i < $n; $i++) {
+        $scaled_array[$i] = $scalar*$arr[$i];
+    }
+    return $scaled_array;
+}
+?>
+
+<?php
+    if(isset($_POST['word_1'])){
+        $word_1 = $_POST['word_1'];
+        $valid_input_1 = validate_string($word_1,14);
+        if($valid_input_1){
+            $word_1_query = "SELECT * FROM wordembeddings WHERE word='$word_1'";
+            $result = pg_query($conn,$word_1_query) or die('Query failed: ' . pg_last_error());
+            //fetch the associative array of results. keys should be ['word','embedding']
+            while ($row = pg_fetch_array($result, null, PGSQL_ASSOC)) {
+                $embedding_string_1 = str_replace(array( '[', ']' ), '', $row['embedding']);
+                $embedding_array_1 = explode(',', $embedding_string_1);
+                echo "<br>";
+            }
+        }
+    }
+    if(isset($_POST['word_2'])){
+        $word_2 = $_POST['word_2'];
+        $valid_input_2 = validate_string($word_2,14);
+        if($valid_input_2){
+            $word_2_query = "SELECT * FROM wordembeddings WHERE word='$word_2'";
+            $result = pg_query($conn,$word_2_query) or die('Query failed: ' . pg_last_error());
+            //fetch the associative array of results. keys should be ['word','embedding']
+            while ($row = pg_fetch_array($result, null, PGSQL_ASSOC)) {
+                $embedding_string_2 = str_replace(array( '[', ']' ), '', $row['embedding']);
+                $embedding_array_2 = explode(',', $embedding_string_2);
+                echo "<br>";
+            }
+        }
+    }
+    if($valid_input_1 && $valid_input_2){
+        echo $word_1 . "+" . $word_2;
+        $sum_array = add_arrays($embedding_array_1,$embedding_array_2);
+        $sum_array_string = '[' . implode(',', $sum_array) . ']';
+    }
+
+?>
+
+<?php
+// Performing SQL query
+$query = "SELECT * FROM wordembeddings ORDER BY embedding <-> '$sum_array_string' LIMIT 5;";
+$result = pg_query($conn,$query) or die('Query failed: ' . pg_last_error());
+
+// Printing results in HTML
+echo "<table>\n";
+while ($row = pg_fetch_array($result, null, PGSQL_ASSOC)) {
+    echo "\t<tr>\n";
+    foreach ($row as $col_value) {
+        echo "\t\t<td>$col_value</td>\n";
+    }
+    echo "\t</tr>\n";
+}
+echo "</table>\n";
+
+// Free resultset
+pg_free_result($result);
+
+// Closing connection
+pg_close($conn);
+?>
+
+<html>
+<head>
+</head>
+<body>
+<h1>Hello!</h1>
+</body>
+</html>