mysql select * or desired parameters in php function - php

Question

I have a function which selects the * values from a particular table, I need to configure that if I pass * in parameter then it selects all or the selected parameters.
My function is as follows:
public function select($tablename){
$select = mysql_query("SELECT * FROM $tablename");
if(!$select){
echo "cant select table mane";
}
while ($row = mysql_fetch_array($select)){
print_r($row);
}
}
How can I pass the dynamic colum name in place of *

Answer 1

public function select($tablename,$column=NULL){
if($column == null) {
$select = mysql_query("SELECT * FROM $tablename");
} else {
$select = mysql_query("SELECT ".$column." FROM $tablename");
}
call it using select("abcd_table","id,name"); OR for all just select("abcd_table");
By Alex
Avoid mysql, it is deprecated. Use mysqli or PDO instead

Answer 2

That's even easier:
public function select( $tablename , $columnName = array() ){
$columnName = $columnName ? implode( ',' , $columnName ) : '*';
$select = mysql_query( 'SELECT ' . $columnName . ' FROM ' . $tableName );
if(!$select){
echo "cant select table mane";
}
while ($row = mysql_fetch_array($select)){
print_r($row);
}
}

Answer 3

Add one more parameter $columnname type array in your function.
public function select($tablename,$columnname = array()){
if(count($columnname)){
$columnname = implode(",",$columnname);
$select = mysql_query("SELECT {$columnname} FROM $tablename");
}
else{
$select = mysql_query("SELECT * FROM $tablename");
}
#code continue
}
Calling will be like below
To select all fields,
select($tablename);
To select some fields,
select($tablename,array('field','field2'));
Note: Please, don't use mysql_* functions in new code. They are no longer maintained and are officially deprecated. See the red box? Learn about prepared statements instead, and use PDO, or MySQLi - this article will help you decide which. If you choose PDO, here is a good tutorial.

Answer 4

public function select($tablename, $selectrow){
$select = mysql_query("SELECT $selectrow FROM $tablename");
if(!$select){
echo "cant select table mane";
}
while ($row = mysql_fetch_array($select)){
print_r($row);
}
}

Answer 5

try this modified function
public function select($tablename,$array_fields){
if(!empty($array_fields)){
$fieldstr = implode(',',$array_fields);
$fieldstr = trim($fieldstr,',');
}else{
$fieldstr = '*';
}
$select = mysql_query("SELECT $fieldstr FROM $tablename");
if(!$select){
echo "cant select table mane";
}
while ($row = mysql_fetch_array($select)){
print_r($row);
}
}

Answer 6

public function select($tablename,$column="*"){
$select = mysql_query("SELECT $column FROM $tablename");
if(!$select){
echo "cant select table mane";
}
while ($row = mysql_fetch_array($select)){
print_r($row);
}
}
call like select("table","*") or
call like select("table","col1,col2")