how to split a string into substring using php [duplicate] - php

Question

This question already has answers here:
How can I bind an array of strings with a mysqli prepared statement?
(7 answers)
Closed 6 months ago.
I have a string like this 'dubai,sharjah,' and I want to make it like this 'dubai','sharja',
I am passing the value dubai,sharjah, in the URL using ajax and my code
$city=$_GET['city'];
$sql = "SELECT * FROM filter where isdeleted = 0 ";
if ($city !="" && $city !="Empty" ){
$sql.=" and twon in ('".$citydata."')";
}
when I print the query, it's like this
SELECT * FROM filter where isdeleted = 0 and twon in ('dubai,sharjah,')
but I want it like this
SELECT * FROM filter where isdeleted = 0 and twon in ('dubai','sharja')
Can anyone guide me on how to do this using PHP?

Answer 1

Here's how I would approach it. I'm going to use PDO instead of mysqli because trying to get an array into mysqli_stmt::bind_param is just a pain.
First, create an array of cities, removing any empty values
$params = array_filter(explode(',', $city), function($c) {
return !empty($c) && $c !== 'Empty';
});
$paramCount = count($params);
$query = 'SELECT * FROM filter where isdeleted = 0';
Now generate a placeholder string for your prepared statement.
if ($paramCount) {
$placeholders = implode(',', array_fill(0, $paramCount, '?');
// looks something like '?,?'
$query .= " AND twon IN ($placeholders)";
}
Now, prepare a statement
// assuming you have a PDO instance in $pdo created with something like
// $pdo = new PDO('mysql:host=localhost;dbname=your_db;charset=utf8', 'username', 'password', [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
$stmt = $pdo->prepare($query);
Execute and fetch values :)
$stmt->execute($params);
$filters = $stmt->fetchAll(PDO::FETCH_ASSOC);

Answer 2

$cities = explode(",", $_GET['city']);
//escape!
foreach ($cities as $citykey => $city) {
$cities[$citykey] = "'" . mysql_real_escape_string($city) . "'";
}
$sql = "SELECT * FROM `filter` where `isdeleted` = 0";
if (!empty($cities)) {
$sql .= ' and `twon` in (' . implode(',', $cities) . ')';
}

Answer 3

An alternative is to use FIND_IN_SET(). No PHP code change needed.
$sql.=" and FIND_IN_SET(town, '".$citydata."')";

Answer 4

you can try to explode the string
$cityparts = explode(",",$city);
and you can use
$cityparts[0] and $cityparts[1] in your query
array explode ( string $delimiter , string $string [, int $limit ] )
you can find more information on [http://www.php.net/explode]
hope this helps!!

Answer 5

You just have to explode and implode here. Rest is the problem with extra , in your string at the end.
$str = "dubai,sharjah,";
$citydata = implode("','",explode(',',rtrim($str,',')));
echo "'$citydata'";
test

Answer 6

After 6 answers I gotta add a 7th:
$sql.=" and twon in ('".str_replace(",","','",$citydata)."')";

Answer 7

You can do this.
$string = 'dubai,sharjah';
$cities = explode(',', $string);
echo $cities[0]; //dubai
echo $cities[1]; //sharjah

Answer 8

try this
$str = "dubai,sharjah,";
$arr = explode(",", $str);
$arr_temp = array()
foreach($arr as $s)
{
if($s!="")
{
$arr_temp[] = "'".$s."'";
}
}
$new_str = implode(",", $arr_temp);
echo $new_str; // output 'dubai','sharjah'
Now your Sql will be
$sql = "SELECT * FROM filter where isdeleted = 0 and twon in ($new_str) ";

Answer 9

You can use it
in $city I fix two values with, you can use here by $_GET ;
$city = "dubai,sharjah,";
$query_string ="";
$words = explode(",",$city);
for($i=0;$i<count($words);$i++){$query_string .= "'".$words[$i]."',";}
$query_string = substr($query_string,0,strlen($query_string)-4);
then use your query
SELECT * FROM filter where isdeleted = 0 and twon in ($query_string)

Answer 10

if ($city !="" && $city !="Empty" )
{
$city_exp = explode(',' $city);
$sql .= " and twon in ('".implode("', '", $city_exp)."')";
}
What we are basically doing here is putting the two values in an array by using explode and then separating each item in that array by using implode
DEMO