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PHP while loop


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Hi everyone,


I am still learning to do PHP, please be patient with me. Thank you so much! I am trying to understand how "while loop" work in PHP, or do you recommend me use foreach, for, or do for array list from MySQL database?


my Code in PHP:


<!doctype html>
<title>Test foreach columns</title>
<link href="default.css" rel="stylesheet" type="text/css">
$Garydb = mysqli_connect("XXXXXX","XXXXXX","XXXXXX") or die("Could not connect MySQL Database");
mysqli_select_db($Garydb, "XXXXXX") or die("Could not find Database");
$display = mysqli_query($Garydb, $sql);
while($key = mysqli_fetch_array($display)) 
echo "<table><tr><td>".$key."</td><td>".$key."</td></tr></table>";
seem display on website showing "Array Array" 12 row and 2 columns, what I did do wrong?
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while() loops will loop until the condition is no longer true. In the case of mysqli results, mysqli_fetch_* functions all return false when they reach the end of the result set.


foreach() is for loop through arrays.


$key in your code is an array of the columns in the current row. You need $key[0], $key[1] etc to echo the individual fields. Or you can use field names as the key (but I don't know what they are as you use select * ). When you come back to the code in a few months you won't know what it's selecting either. Specify just the columns you want and not * .

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