PHP - how to print each row of an array - php

Question

I feel like I'm missing something really simple here. Here's my sql query:
$getpages = "SELECT id FROM pages WHERE account = 2 ORDER BY page_order";
$showpages = #mysqli_query ($dbc, $getpages);
$row = mysqli_fetch_array($showpages, MYSQLI_NUM);
I then print the first result:
echo $row[0];
And get a correct value, the id of the first page (by page order):
10
So I submit a form which simply turns that $row[0] into $row[1].
And nothing prints. I don't understand.

Answer 1

You have to do this:
while ($row = mysqli_fetch_array($showpages, MYSQLI_NUM)) {
$id = $row[id];
// do something with the id
echo $id . "<br/>"; // Echo every id
}
This will iterate through all of the results

Answer 2

mysqli_fetch_array is a special function as each time you call it, it outputs the NEXT row.
So:
while ($row = mysqli_fetch_array(stuff)){
$var = $row['sql column'];
// In your case "$var = $row[0];" to get the id for the first row found.
}
is how you use it.
This will keep running the function until mysqli_fetch_array() eventually returns false. These each time it will output a new row. And the $row array is the array of one row in the sql table.
Use :
print_r($row);
in the while loop to see exactly what's being returned for use.

Answer 3

$getpages = "SELECT id FROM pages WHERE account = 2 ORDER BY page_order";
$showpages = #mysqli_query ($dbc, $getpages);
$row = mysqli_fetch_array($showpages, MYSQLI_NUM);
Question how many rows are fetched in this query in this case id, So MYSQL will result to 1 row affected, But since you are using
$row = mysqli_fetch_array($showpages, MYSQLI_NUM);
This code you used will not output anything try
$row[n] as n-1

Answer 4

$result->fetch_assoc() or mysqli_fetch_assoc($result)
catch one line at a time, from a mysqli_result:
$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 results";
}
source: http://www.w3schools.com/php/php_mysql_select.asp