How to make <option selected = "selected"> installed by MySQL and PHP?

Question

How to make <option selected="selected">installed MySQL and PHP?

My code is:

echo '<select>';
$tempholder = array();
$rs = mysql_query("SELECT * FROM id ORDER BY year");
$nr = mysql_num_rows($rs);
for ($i=0; $i<$nr; $i++){
    $r = mysql_fetch_array($rs);
    //if($year==$r["year"]){ $selected=' selected="selected"'; }//doesn't work so
    if (!in_array($r['year'], $tempholder)){
        $tempholder[$i] = $r['year'];
        echo "<option>".$r["year"]."</option>";//<option$selected>...
    }
}
unset($tempholder);
echo '</select>';

Answer 1

In addition to fixing =/ ==gotcha, you can save on finding an array and make the code easier by asking the database to return only once a year each year:

<select>
    <?php $result= mysql_query('SELECT DISTINCT year FROM id ORDER BY year'); ?>
    <?php while($row= mysql_fetch_assoc($result)) { ?>
        <option <?php if ($row['year']==$year) { ?>selected="selected"<?php } ?>>
            <?php echo htmlspecialchars($row['year']); ?>
        </option>
    <?php } ?>
</select>

( htmlspecialchars(), , , HTML-escape , HTML. , echo htmlspecialchars, . )

Answer 2

:

    echo '<select>';
$tempholder = array();
$rs = mysql_query("SELECT * FROM id ORDER BY year");
$nr = mysql_num_rows($rs);
for ($i=0; $i<$nr; $i++){
    $r = mysql_fetch_array($rs);
    if (!in_array($r['year'], $tempholder)){
        $tempholder[$i] = $r['year'];
        echo "<option".(($year==$r["year"])? ' selected="selected"' : '').">".$r["year"]."</option>";
    }
}
unset($tempholder);
echo '</select>';

, .

, $year = $r [ "year" ], .

Answer 3

$selected , :

echo '<select>';
$tempholder = array();
$rs = mysql_query("SELECT * FROM id ORDER BY year");
$nr = mysql_num_rows($rs);
for ($i = 0; $i < $nr; $i++){
    if($year == $r["year"]) { //not $year = $r["year"]
        $selected=' selected="selected"';
    }
    else {
       $selected = "";
    }
    $r = mysql_fetch_array($rs);
    if (!in_array($r['year'], $tempholder)){
        $tempholder[$i] = $r['year'];
        echo "<option$selected>" . $r["year"] . "</option>";
    }
}
unset($tempholder);
echo '</select>';

Answer 4

, , ( mysqli , PHP 5), , . mysql_, - , mysqli_ :

$conn = new mysqli($host, $username, $password, $dbname);

if  ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

, $year ( GET SESSION )

$year = $_POST['year'];

( , ):

$result=$conn->query($sql);
    while($row = $result->fetch_assoc()) {    
        if ($row['year']==$year) {
            $selected = 'selected="selected"';
        }
        else {
            $selected = '';
        }   
        echo '<option value="'.$row['year'].'" '. $selected . '>"'
            . $row['year'] .'</option>';
    }