implode

Anonymous (2013-04-22 09:32:09)

/*Defining the associative array to keep the name of
              toppings checked*/    
            $arrayOfMeatToppingsSelected = array();
            $arrayOfVegetablesToppingsSelected = array();

            //Imploding of the names of the toppings checked
            $implodedArrayOfMeatToppingsSelected = implode(', ', $arrayOfMeatToppingsSelected);    
            $implodedArrayOfVegetablesToppingsSelected = implode(', ', $arrayOfVegetablesToppingsSelected);            

        <form action="orderConfirmation.php" method="post">
                    <input type="hidden" name="firstName" value="<?php echo $firstName; ?>" />
                    <input type="hidden" name="lastName" value="<?php echo $lastName; ?>" />
                    <input type="hidden" name="address" value="<?php echo $address; ?>" />
                    <input type="hidden" name="city" value="<?php echo $city; ?>" />
                    <input type="hidden" name="province" value="<?php echo $province; ?>" />
                    <input type="hidden" name="postalCode" value="<?php echo $postalCode; ?>" />
                    <input type="hidden" name="telephone" value="<?php echo $telephone; ?>" />
                    <input type="hidden" name="email" value="<?php echo $email; ?>" />
                    <input type="hidden" name="numberPizza" value="<?php echo $numberPizza; ?>" />
                    <input type="hidden" name="sizePizza" value="<?php echo $sizePizza; ?>" />
                    <input type="hidden" name="crustTypePizza" value="<?php echo $crustTypePizza; ?>" />
                    <input type="hidden" name="toppings" value="<?php echo $checkBoxCount; ?>" />
                    <input type="hidden" name="extrasPizza" value="<?php echo $extrasPrice; ?>" />
                    <input type="hidden" name="price" value="<?php echo $price; ?>" />
                    <input type="hidden" name="priceTax" value="<?php echo $priceTax; ?>" />
                    <input type="hidden" name="finalPrice" value="<?php echo $finalPrice; ?>" />
                    <input type="hidden" name="deletion" value="<?php echo "1"; ?>" />
                    <input type="hidden" name="implodedArrayOfMeatToppingsSelected" 
                        value="<?php echo $implodedArrayOfMeatToppingsSelected; ?>" />
                    <input type="hidden" name="implodedArrayOfVegetablesToppingsSelected" 
                        value="<?php echo $implodedArrayOfVegetablesToppingsSelected; ?>" />
            
                    <input type="submit" value="Submit" />
                </form>

omar dot ajoue at kekanto dot com (2013-03-18 14:21:09)

Can also be used for building tags or complex lists, like the following:

<?php

$elements = array('a', 'b', 'c');

echo "<ul><li>" . implode("</li><li>", $elements) . "</li></ul>";

?>

This is just an example, you can create a lot more just finding the right glue! ;)

jento (2013-03-06 01:21:27)

function implode_r($glue,$arr){
$ret_str = "";
foreach($arr as $a){
$ret_str .= (is_array($a)) ? implode_r($glue,$a) : "," . $a;
}
return $ret_str;
}

Anonymous (2013-02-26 15:56:31)

It may be worth noting that if you accidentally call implode on a string rather than an array, you do NOT get your string back, you get NULL:
<?php
var_dump(implode(':', 'xxxxx'));
?>
returns
NULL

This threw me for a little while.

masterandujar (2012-09-03 06:15:39)

Even handier if you use the following:

<?php
$id_nums = array(1,6,12,18,24);

$id_nums = implode(", ", $id_nums);
                
$sqlquery = "Select name,email,phone from usertable where user_id IN ($id_nums)";

// $sqlquery becomes "Select name,email,phone from usertable where user_id IN (1,6,12,18,24)"
?>

alexey dot klimko at gmail dot com (2011-06-23 05:04:36)

If you want to implode an array of booleans, you will get a strange result:
<?php
var_dump(implode('',array(true, true, false, false, true)));
?>

Output:
string(3) "111"

TRUE became "1", FALSE became nothing.

houston_roadrunner at yahoo dot com (2009-04-07 11:50:24)

it should be noted that an array with one or no elements works fine. for example:

<?php
    $a1 = array("1","2","3");
    $a2 = array("a");
    $a3 = array();
    
    echo "a1 is: '".implode("','",$a1)."'<br>";
    echo "a2 is: '".implode("','",$a2)."'<br>";
    echo "a3 is: '".implode("','",$a3)."'<br>";
?>

will produce:
===========
a1 is: '1','2','3'
a2 is: 'a'
a3 is: ''

php.net {at} nr78 {dot} net (2005-03-30 06:50:32)

Also quite handy in INSERT statements:

<?php

   // array containing data
   $array = array(
      "name" => "John",
      "surname" => "Doe",
      "email" => "j.doe@intelligence.gov"
   );

   // build query...
   $sql  = "INSERT INTO table";

   // implode keys of $array...
   $sql .= " (`".implode("`, `", array_keys($array))."`)";

   // implode values of $array...
   $sql .= " VALUES ('".implode("', '", $array)."') ";

   // execute query...
   $result = mysql_query($sql) or die(mysql_error());

?>

Cedric at isoca dot com (2002-07-11 10:39:14)

Implode with an unset array will made a warning and fail, but is ok with an empty array.
So if you don't trust the content of the array, allways initialize it before :
$param = array();
[...]
echo implode('&', $param);