Can someone please help? I'm new to PHP and struggling to make this bit of code to work. For example I have a sql database table with the following schema and data:
Type....rent_price
a..........100
b..........200
c..........300
I want to be able to echo say, "a", in one section and "200" in another. The following code will display "a" but then I can't seem to get it to display anything from the rent_price column using a second array.
$result = $mysqli->query("SELECT * FROM dbc_posts ORDER BY ID ASC limit 3");
for ($set = array (); $row = $result->fetch_assoc(); $set[] = $row['type']);
for ($set1 = array (); $row = $result->fetch_assoc(); $set1[] =$row['rent_price']);
?>
<?php echo $set[0];?>
<?php echo $set1[1];?>
You loop through the results twice, without resetting. Try to loop only once:
$result = $mysqli->query("SELECT * FROM dbc_posts ORDER BY ID ASC limit 3");
$set = array ();
$set1 = array ();
while ($row = $result->fetch_assoc())
{
$set[] = $row['type'];
$set1[] =$row['rent_price'];
}
?>
<?php echo $set[0];?>
<?php echo $set1[1];?>
Depending on what you mean by '"a" in one section and "200" in another', you may be able to forgo creating the intermediate arrays and just print the values from your query as you fetch them. Two cells in a table row, for example:
while ($row = $result->fetch_assoc()) {
echo "<tr><td>$row[type]</td><td>$row[rent_price]</td></tr>";
}
your data is in the first element of array
$set1[0]
but youre probably better off maintaining the naming throughout
$results = array();
while ($row = $result->fetch_assoc()){
$results[] = $row;
}
foreach ($results as $result){
echo $result['type'];
echo $result['rent_price'];
}
OR
$results = array();
while ($row = $result->fetch_assoc()){
$results['types'][] = $row['type'];
$results['rent_prices'][] = $row['rent_price'];
}
foreach ($results['types'] as $type){
echo $type;
}
foreach ($results['rent_prices'] as $rent_price){
echo $rent_price;
}
Related
Some code to fetch the field names by connecting it with db:
<?php
#mysql_connect("localhost", "root", "") or die(mysql_error());
mysql_select_db("test") or die(mysql_error());
$result = mysql_query("SELECT * FROM sample");
$storeArray = Array();
while ($row = mysql_fetch_array($result)) {
if (mysql_num_rows($result) > 0) {
$storeArray = $row['name'];
echo $storeArray;
}
}
?>
The above code works just fine but when it runs it gives me ramuraja. Here ramu and raja are seperate fields. But its giving me a joined output.
How can i get the two field value seperately like ramu and raja.
You print / echo the values directly after one another. Using echo $storeArray.'<br>'; would print a linebreak additionally, thus printing
ramu
Raja
However, you could also store all the variables in an array, for example with $storeArray[] = $row['name']; instead of $storeArray = $row['name'];. That would create a new array element, the value being $row['name'], while the key is incrementing for every element being added.
After having received all rows that match the query, you could loop through the array and Display the answers.
EDIT: Please check out mysqli or PDO; those PHP extensions are standard with newer versions and should be used instead of the old (and now deprecated) mysqli solution. Don't worry, they can do the same (and much more).
You need to do a for each statement to iterate through the array and echo the field along with a line break
First of all, you're declaring $storeArray as an array in this line: $storeArray = Array();, but later you replace it with a string $storeArray = $row['name'];
If you want to use $storeArray as an array, change this line:
$storeArray = $row['name'];
into
$storeArray[] = $row['name']; //add element to the array
Now loop all the results (remove echo $storeArray;)
After you've fetched all the results you kan echo them like:
foreach($storeArray as $name){
echo $name.'<br>';
}
Some confusion in code ....
first check ifthere are results:
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_array($result)) {
....
}
}
than be more clear about what you wont:
an array :
$storeArray = Array();
or a string:
$storeArray = $row['name'];
I would so like this:
$storeArray = Array();
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_array($result)) {
$storeArray[] = $row['name'];
}
}
// array
print_r($storeArray);
// string
echo implode(',', $storeArray);
$result = mysql_query("SELECT * FROM Race");
$rows = mysql_num_rows($result);
for ($i = 0 ; $i < $rows ; ++$i)
{
$row = mysql_fetch_row($result);
echo $row[0];
}
above is probably an awkward method but it'll print out all datas stored in first column, which is good but now, I want to store each one of them into an array...
I tried
$array[$i]=$row[0];
and echoed it out, but it just prints"Array"...
I tried
$result = mysql_query("SELECT raceid FROM Race");
while ($row = mysql_fetch_array($result)) {
$array[]=$row[0];
}
...which does the same as code written before, i guess, since it too just print "Array".
Please help! Thank you!!
Do you use simple echo $array;? It's wrong. You can't output array this way.
Use this:
$array = array();
$result = mysql_query("SELECT raceid FROM Race");
while ($row = mysql_fetch_array($result)) {
$array[]=$row[0];
}
foreach($item in $array) {
echo $item."<br>"; // and more format
}
If you want to watch array contents without any format use (e.g. for debugging) print_r or var_dump:
print_r($array);
var_dump($array);
Advice: better to use assoc array.
$array = array();
$result = mysql_query("SELECT raceid FROM Race");
while ($row = mysql_fetch_array($result)) {
$array[]=$row['raceid'];
}
Advanced advice: better to use PDO and object results.
You SQL code will be invulnerable to SQL injections
Code will be more modern and readable.
I have an existing database which has a table called PERSON with a field called NAME. What I’m trying to do is select all of the rows in the table where the NAME is "bill". And then I want the result to be stored in an array that I can step through at a later point.
Now, the problem is my code will only select the FIRST row with the name "bill" and ignore the rest of the rows where the NAME is "bill". At least that’s how it appears when I print out the array contents with print_r(). My code below:
<?php
$getAllPreview = "SELECT * from PERSON where NAME = 'bill'";
$getAllResult = #mysql_query( $getAllPreview );
$getAllRows = #mysql_fetch_assoc( $getAllResult );
print "<pre>";
print_r($getAllRows);
print "</pre>";
?>
<?php
$getAllPreview = "SELECT * from PERSON where NAME = 'bill'";
$getAllResult = #mysql_query( $getAllPreview );
while ($row = #mysql_fetch_assoc( $getAllResult ) ) {
$getAllRows[] = $row;
}
print "<pre>";
print_r($getAllRows);
print "</pre>";
?>
while($row = mysql_fetch_array($getAllResult, MYSQL_ASSOC)) {
$data[] = $row;
}
You just keep looping over mysql_fetch_assoc until no further rows are returned. If you want to output or process them, just do so in each iteration of the loop, as it's more efficient than placing it in an array first. But here you go anyway:
$allRows = array ();
while ($row = mysql_fetch_assoc( $getAllResult)) $allRows [] = $row;
<?php
$getAllPreview = "SELECT * from PERSON where NAME = 'bill'";
$getAllResult = #mysql_query( $getAllPreview );
$num_rows = mysql_num_rows($getAllResult);
while ($row = #mysql_fetch_assoc($getAllResult))
{
for($i=0;$i<$num_rows;$i++)
{
$array[] = $row;
}
}
?>
I have a problem iterating through an sql query:
$result = mysql_query("SELECT * FROM transactions");
while($row = mysql_fetch_array($result)) {
// this returns 3 rows
foreach ($row as $values)
{
//fputcsv($a_csv, $values;
echo $values;
}
}
The script iterates fine but it appears to be going through each row twice. So what I receive in output is the following:
value1value1value2value2value3value3
I'm not sure why this is - could anyone explain please?
Thankyou
mysql_fetch_array fetches both the named & the numerical keys. Use either mysql_fetch_assoc or mysql_fetch_row.
$result = mysql_query("SELECT * FROM transactions");
//return an associative array
while($row = mysql_fetch_assoc($result)) {
// this returns 3 rows
$values = "{$row["name_of_column1"]}, {$row["name_of_column2"]}, {$row["name_of_column3"]}";
//fputcsv($a_csv, $values;
//print the whole row array
print_r($row);
//echo value in format value1, value2, value3
echo $values;
}
You need to access $row like this $row[0] And $row shouldn't be in a foreach() itself unless it too is some kind of array you need to iterate through.
$result = mysql_query("SELECT * FROM transactions");
while($row = mysql_fetch_row($result))
{
echo $row[0];
echo $row[1];
// ... etc.
}
I have the following:
while($myRow = odbc_fetch_array( $result )){ <--lots of rows
$thisResult['name'] = $myRow["name"] ;
$thisResult['race'] = $myRow["race"] ;
$thisResult['sex'] = $myRow["sex"];
$thisResult['dob'] = $myRow["dob"];
}
I can't figure out how to print this back out.
I want to get each row and iterate through each row in the array like a datareader. I'm not sure what to do. I do not want to do the echo in the while. I need to be able to print it out elsewhere. But I don't think I've done it right here to be able to print it later.
I also tried, this, however:
while($myRow = odbc_fetch_array( $result )){ <--lots of rows
print($thisResult[$myRow["name"]] = $myRow);
}
I then tried:
while($myRow = odbc_fetch_array( $result )){ <--lots of rows
print (odbc_result($myRow,"name"));
}
but got an error.
Thank you for any help.
EDIT: when I do this:
while($myRow = odbc_fetch_array( $result )){
print ($myRow["name"]);
}
I get undefined index name. I am mainly concerned with saving to an array but I have to be able to do it in the loop first.
Declare an array before and assign the values to it:
$rows = array();
while($myRow = odbc_fetch_array( $result )){ <--lots of rows
$rows[] = $myRow;
}
Then you can print it e.g. this way:
foreach($rows as $row) {
foreach($row as $key => $value) {
echo $key . ': '. $value;
}
}
or however you want to.
You don't have to access and assign $thisResult['name'] = $myRow["name"] in your while loop as $myRow already is an array. You just copy the values which is unnecessary.
You say you have a lot of rows. Depending of what you really want to do with data, it might be better to put all this functionality into the while loop to avoid creating an array.
How about something like:
$output = '';
while($myRow = odbc_fetch_array( $result )) {
$output = $output."Your name is {$myRow["name"]} and your race is {$myRow["race"]}\n";
}
// print output later...