JOIN ARRAY elements with a STRING.
This function is an alias to join.
<?php
str implode ( arr $pieces )
or
str join ( arr $pieces )
where,
$pieces = The ARRAY of STRINGS to implode
?>
<?php
str implode ( str $glue , arr $pieces )
or
str join ( str $glue , arr $pieces )
where,
$glue = The defaults to an empty STRING
$pieces = The ARRAY of STRINGS to implode
?>
EXERCISE
<?php
$pieces01 = ["RED", "GREEN", "BLUE"];
$implstr01 = implode($pieces01);
echo $implstr01;
?>
EXERCISE
<?php
$pieces02 = ['RED', 'GREEN','BLUE'];
$glue02 = '+';
$inplstr02 = implode($glue02, $pieces02);
echo $inplstr02;
?>
EXERCISE
<?php
$pieces03 = ['RED' => 'ff0000',
'GREEN' => '00ff00',
'BLUE' => '0000ff'];
$glue03 = ' * ';
$inplstr03 = implode($glue03, $pieces03);
echo $inplstr03;
?>
EXERCISE
<?php
$pieces04 = ['AEAD, Autenticated Encryption with
Associated Data, is a form of encryption which
simultaneously provides confidentiality, integrity,
and authenticity assurances on the data.','
GCM, Galois/Counter Mode is a mode of operation for
symmetric key cryptographic block ciphers that has
been widely adopted because of its efficiency
and performance.','
GCM throughput rates for state-of-the-art, high-speed
communication channels can be achieved with
reasonable hardware resources.', '
CCM, (Counter with CBC-MAC) is a mode of operation for
cryptographic block ciphers.', '
It is an authenticated encryption algorithm designed
to provide both authentication and confidentiality.', '
CCM mode is only defined for block ciphers with a
block length of 128 bits.'];
$glue04 = '<br><br>';
$inplstr04 = implode($glue04, $pieces04);
echo $inplstr04;
?>
EXERCISE
<?php
$val01 = 15*14;
$val02 = 15*16;
$val03 = 15*17;
$arr = [
"val15" => 15,
"val14" => 14,
"val16" => 16,
"val17" => 17
];
echo '<pre>';
print_r($arr);
echo '</pre>';
$pieces = implode('*', $arr);
echo $pieces;
?>
EXERCISE
<?php
$s = "het leven is net erwtensoep -
je kunt er geen touw aan vastknopen";
for($i=0; $i<3; $i++) {
echo implode(count_chars($s, $i))."<br><br>";
}
echo $a = count_chars($s, 3), "<br><br>";
echo (int) strlen(count_chars($s, 4)) == 256-strlen($a),"<br><br>";
echo strlen(count_chars($s, 4)) == 256-strlen($a),"<br>";
?>
EXERCISE
<?php
echo implode(array());
echo implode('nothing', array())."<br>";
echo implode(array('foo', 'bar', 'baz'))."<br>";
echo implode(':', array('foo', 'bar', 'baz'))."<br>";
echo implode(':', array('foo', array('bar', 'baz'), 'burp'));
?>
EXERCISE
<?php
echo "Testing implode() for basic operations.";
$arrays = array (
array(1,2),
array(1.1,2.2),
array(array(2),array(1)),
array(false,true),
array(),
array("a","aaaa","b","bbbb","c","ccccccccccccccccccccc")
);
/* loop to output string with ', ' as $glue, using implode() */
foreach ($arrays as $array) {
var_dump( implode(', ', $array) );
var_dump($array);
}
echo "<br><br>Testing implode() with variations of glue:<br>";
/* checking possible variations */
$pieces = array (
2,
0,
-639,
true,
"PHP",
false,
NULL,
"",
" ",
"string\x00with\x00...\0"
);
$glues = array (
"TRUE",
true,
false,
array("key1", "key2"),
"",
" ",
"string\x00between",
NULL,
-0,
'\0'
);
/* loop through to display a string
containing all the array $pieces
in the same order,
with the $glue string between each element */
$counter = 1;
foreach($glues as $glue) {
echo "<br><br>Iteration: $counter<br>";
try {
var_dump(implode($glue, $pieces));
} catch (TypeError $exception) {
echo $exception->getMessage() . "<br>";
}
$counter++;
}
/* empty string */
echo "<br><br>Testing implode() on empty string:<br>";
try {
implode("");
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* checking sub-arrays */
echo "<br><br>Testing implode() on sub-arrays:<br>";
$sub_array = array(array(1,2,3,4),
array(1 => "one", 2 => "two"), "PHP", 50);
var_dump(implode("TEST", $sub_array));
try {
var_dump(implode(array(1, 2, 3, 4), $sub_array));
} catch (TypeError $exception) {
echo $exception->getMessage() . "<br>";
}
try {
var_dump( implode(2, $sub_array) );
} catch (TypeError $exception) {
echo $exception->getMessage() . "<br>";
}
echo "<br><br>Testing implode() on objects:<br>";
/* checking on objects */
class foo
{
function __toString() {
return "Object";
}
}
$obj = new foo(); //creating new object
$arr = array();
$arr[0] = &$obj;
$arr[1] = &$obj;
var_dump( implode(",", $arr) );
var_dump($arr);
/* Checking on resource types */
echo "<br><br>Testing end() on resource type:<br>";
/* file type resource */
$file_handle = fopen(__FILE__, "r");
/* directory type resource */
$dir_handle = opendir( __DIR__ );
/* store resources in array for comparison */
$resources = array($file_handle, $dir_handle);
var_dump( implode("::", $resources) );
echo "<br><br>Testing error conditions:<br>";
/* only glue */
try {
var_dump( implode("glue") );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* int as pieces */
try {
var_dump( implode("glue",1234) );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* NULL as pieces */
try {
var_dump( implode("glue", NULL) );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* pieces as NULL array */
try {
var_dump( implode(",", array(NULL)) );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* integer as glue */
try {
var_dump( implode(12, "pieces") );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* NULL as glue */
try {
var_dump( implode(NULL, "abcd") );
} catch (TypeError $e) {
echo $e->getMessage(), "<br>";
}
/* closing resource handles */
fclose($file_handle);
closedir($dir_handle);
?>