(PHP 4, PHP 5, PHP 7)
implode — 将一个一维数组的值转化为字符串
$glue
, array $pieces
)$pieces
)
用 glue 将一维数组的值连接为一个字符串。
Note:
因为历史原因，implode() 可以接收两种参数顺序，但是 explode() 不行。不过按文档中的顺序可以避免混淆。
glue默认为空的字符串。
pieces你想要转换的数组。
返回一个字符串，其内容为由 glue 分割开的数组的值。
Example #1 implode() 例子
<?php
$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);
echo $comma_separated; // lastname,email,phone
// Empty string when using an empty array:
var_dump(implode('hello', array())); // string(0) ""
?>
Note: 此函数可安全用于二进制对象。
<?php
$dizi = array('soyad?', 'eposta', 'telefon');
$virgül_ayra?l? = implode(",", $array);
echo $virgül_ayra?l?; // soyad?,eposta,telefon
?>
BU ??LEM YANLI?!!!!
$array yerine $dizi olmas? gerekiyordu...yanii.....
<?php
$dizi = array('soyad?', 'eposta', 'telefon');
$virgül_ayra?l? = implode(",", $dizi);
echo $virgül_ayra?l?; // soyad?,eposta,telefon
?>
It is possible for an array to have numeric values, as well as string values. Implode will convert all numeric array elements to strings.
<?php
$test=implode(["one",2,3,"four",5.67]);
echo $test;
//outputs: "one23four5.67"
?>
Dizi i?erisindeki veriyi istenilen yap??t?r?c? ile birle?tirir.
<?php
echo implode(' ', ['lorem','dolor','sit','amed']); //lorem dolor sit amed
?>
implode stops upon encountering NULL
$myArray = ('one', 'two', 'three', null, 'four', 'five');
echo implode(', ', $myArray);
output:
one, two, three
<?php
//Basic loop into <li>, maybe for some help
$some_string= 'jordan pippen rodman jeckson divac shaq';
$string_to_array= explode(' ',$some_string);
foreach ($string_to_array as $value):
echo "<li>";
echo $value;
echo "</li>";
endforeach;
?>
/*jordan
pippen
rodman
jeckson
divac
shaq
*/
It might be worthwhile noting that the array supplied to implode() can contain objects, provided the objects implement the __toString() method.
Example:
<?php
class Foo
{
protected $title;
public function __construct($title)
{
$this->title = $title;
}
public function __toString()
{
return $this->title;
}
}
$array = [
new Foo('foo'),
new Foo('bar'),
new Foo('qux')
];
echo implode('; ', $array);
?>
will output:
foo; bar; qux
A very neat option to limit the number of pieces being imploded is by using array_slice (http://php.net/array_slice):
<?php
$picnames = array("pic1.jpg", "pic2.jpg", "pic3.jpg", "pic4.jpg", "pic5.jpg", "pic6.jpg", "pic7.jpg");
$allpics = implode("|", array_slice($picnames, 0, 5));
?>
Hope it helps!
null values are imploded too. You can use array_filter() to sort out null values.
<?php
$ar = array("hello", null, "world");
print(implode(',', $ar)); // hello,,world
print(implode(',', array_filter($ar, function($v){ return $v !== null; }))); // hello,world
?>
in case you want to implode by keys:
<?php
const POSITION_KEY = 0;
const POSITION_VAL = 2;
const POSITION_DESC = 1;
$key = 'key';
$val = 'val';
$desc = 'desc';
$arr = array(
POSITION_KEY => $key,
POSITION_VAL => $val,
POSITION_DESC => $desc,
);
echo kimplode('=',$arr); // key=desc=val
echo '<br>';
echo krimplode('=',$arr); // val=desc=key
function kimplode($glue,$arr){
ksort($arr);
return implode($glue,$arr);
}
function krimplode($glue,$arr){
krsort($arr);
return implode($glue,$arr);
}
?>
Safe way to pass as parameters in IN
<?php
$id_nums = array(1,6,12,18,24);
$p_types = '';
$qs = array();
foreach ($id_nums as $id) {
$qs[] = '?';
$p_types .= 'i'; // or whatever type
}
$nums_list = implode(',', $qs);
$sqlquery = "Select name,email,phone from usertable where user_id IN ($nums_list)";
$stmt = $dbh->stmt_init();
$stmt->prepare($sqlquery);
// later on, instead of bind:
$parms_array = array_merge(array($p_types), $id_nums);
call_user_func_array(array($stmt,'bind_param'), $parms_array );
// $sqlquery becomes "Select name,email,phone from usertable where user_id IN (?,?,?,?,?)"
?>
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! ;)
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.
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)"
?>
Be sure to escape/sanitize/use prepared statements if you get the ids from users.
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.
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: ''
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());
?>