how can split the result set array to string in php - php

Question

i need help. i was developed a page in smarty , i got a result set from a query and i need to change the result set to string and stored in text area
my query is given below
select val from test
my result set is print in var_dump in controller
{ [0]=> array(1) { ["val"]=> string(1) "c" } [1]=> array(1) { ["val"]=> string(3) "c++" } [2]=> array(1) { ["val"]=> string(4) "java" } [3]=> array(1) { ["val"]=> string(3) "PHP" } }
i need to change in to sting like c,c++,java,PHP
the changing function is preformed only controller
ple help me.. and thk adv

Answer 1

Use foreach for that. See more information here - http://php.net/manual/en/control-structures.foreach.php .
Example -
$array = Array("333", "222", "111");
foreach($array as $string) {
echo $string.'<br />';
}
Another solution would be to use implode.
See more information here - http://php.net/manual/en/function.implode.php and again a small example -
$array = Array("333", "222", "111");
$strings = implode(",", $array); // comma in first quotes are seperator, you can set it also to " " for a single space.
echo $strings; // In this case it will output 333,222,111 if you would set it to empty space then it would output 333 222 11
EDIT:
For writing in file you must use file functions.
Check this link - http://php.net/manual/en/function.file-put-contents.php
example -
// your file
$file = 'sample.txt';
$array = Array("333", "222", "111");
// Add all strings to $content.
foreach($array as $string) {
$content .= $string.'<br />';
}
// write everything in file
file_put_contents($file, $content);
Suggestion:
When you are writing SQL queries, I would suggest that you already now start learning to write them correctly, so they are easier to read.
For example, your query -
select val from test
Could be changed to -
SELECT `val` FROM `test`
which is alot easier to read and understand.

Answer 2

If You need to join all array with some delimeters, then use implode.
Example:
$arr = array("hi", "peter!", "how", "are", "you");
echo implode(" ", $arr) . "?";
//output
// hi peter! how are you?

Answer 3

If you want a string separated by commas, you must use the implode function
string implode ( string $glue , array $pieces )
glue: Defaults to an empty string. This is not the preferred usage of implode() as glue would be the second parameter and thus, the bad prototype would be used.
pieces:The array of strings to implode.
Returns a string containing a string representation of all the array elements in the same order, with the glue string between each element.
http://www.php.net/manual/en/function.implode.php
Example
$array = Array("333", "222", "111");
$string = explode(',', $array);
returns
"333,222,111"
if you want spaces:
$string = explode(' ', $array);
returns
"333 222 111"