I have a string that contains elements from array.
$str = '[some][string]';
$array = array();
How can I get the value of $array['some']['string'] using $str?
This will work for any number of keys:
$keys = explode('][', substr($str, 1, -1));
$value = $array;
foreach($keys as $key)
$value = $value[$key];
echo $value
You can do so by using eval, don't know if your comfortable with it:
$array['some']['string'] = 'test';
$str = '[some][string]';
$code = sprintf('return $array%s;', str_replace(array('[',']'), array('[\'', '\']'), $str));
$value = eval($code);
echo $value; # test
However eval is not always the right tool because well, it shows most often that you have a design flaw when you need to use it.
Another example if you need to write access to the array item, you can do the following:
$array['some']['string'] = 'test';
$str = '[some][string]';
$path = explode('][', substr($str, 1, -1));
$value = &$array;
foreach($path as $segment)
{
$value = &$value[$segment];
}
echo $value;
$value = 'changed';
print_r($array);
This is actually the same principle as in Eric's answer but referencing the variable.
// trim the start and end brackets
$str = trim($str, '[]');
// explode the keys into an array
$keys = explode('][', $str);
// reference the array using the stored keys
$value = $array[$keys[0][$keys[1]];
I think regexp should do the trick better:
$array['some']['string'] = 'test';
$str = '[some][string]';
if (preg_match('/\[(?<key1>\w+)\]\[(?<key2>\w+)\]/', $str, $keys))
{
if (isset($array[$keys['key1']][$keys['key2']]))
echo $array[$keys['key1']][$keys['key2']]; // do what you need
}
But I would think twice before dealing with arrays your way :D
Related
I have a string
$str = 'utmcsr=google|utmcmd=organic|utmccn=(not set)|utmctr=(not provided)';
Need to convert this string in below format.
$utmcsr = google;
$utmcmd= organic;
$utmccn= (not set);
$utmctr= (not provided);
and more can come. I have try explode and slip function but not gives result. Please suggest.
Thanks in advance
With "Double explode" you can extract all key-value pairs from the string. First, explode on the pipe symbol, the resuting array contains strings like utmcsr=google. Iterate over this array and explode each string on the equal sign:
$result = [];
$str = 'utmcsr=google|utmcmd=organic|utmccn=(not set)|utmctr=(not provided)';
$arr = explode('|', $str);
foreach($arr as $str2) {
$values = explode('=', $str2);
$result[ $values[0] ] = $values[1];
}
Try this one
$str = 'utmcsr=google|utmcmd=organic|utmccn=(not set)|utmctr=(not provided)';
$new_array = explode('|', $str);
$result_array = array();
foreach ($new_array as $value) {
$new_arr = explode('=', $value);
$result_array[$new_arr[0]] = $new_arr[1];
}
extract($result_array);
echo $utmcsr;
echo $utmctr;
Output: google(not provided)
How to extract values from string seperated by |
here is my string
$var='foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
i need to store
$foo=1478
$boo=7854
$ccc=74125
Of course every body would suggest the explode route:
$var = 'foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
foreach(array_filter(explode('|', $var)) as $e){
list($key, $value) = explode('=', $e);
${$key} = $value;
}
Also, another would be to convert pipes to ampersand, so that it can be interpreted with parse_str:
parse_str(str_replace('|', '&', $var), $data);
extract($data);
echo $foo;
Both would produce the same. I'd stay away with variable variables though, it choose to go with arrays.
Explode the string by | and you will get the different value as array which is separated by |. Now add the $ before each value and echo them to see what you want.
$var = 'foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
$arr = explode("|", $var);
$arr = array_filter($arr);
foreach($arr as $val){
echo "$".$val."<br/>";
}
You will get:
$foo=1478
$boo=7854
$bar=74125
$aaa=74125
$bbb=470
$ccc=74125
$ddd=1200
OR if you want to store them in the $foo variable and show only the value then do this:
$var = 'foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
$arr = explode("|", $var);
$arr = array_filter($arr);
foreach($arr as $val){
$sub = explode("=", $val);
$$sub[0] = $sub[1];
}
echo $foo; //1478
You can use PHP variable variable concept to achieve your objective:
Try this:
<?php
$var='foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
$vars=explode("|",$var);
foreach($vars as $key=>$value){
if(!empty($value)){
$varcol=explode("=",$value);
$varname=$varcol[0];
$varvalue=$varcol[1];
$$varname=$varvalue; //In this line we use $$ i.e. variable variable concept
}
}
echo $foo;
I hope this works for you....
You can use explode for | with array_filter to remove blank elements from array, and pass the result to array_map with a reference array.
Inside callback you need to explode again for = and store that in ref array.
there after use extract to create variables.
$var='foo=1478|boo=7854|bar=74125|aaa=74125|bbb=470|ccc=74125|ddd=1200|';
$result = array();
$x = array_map(function($arr) use(&$result) {
list($key, $value) = explode('=', $arr);
$result[$key] = $value;
return [$key => $value];
}, array_filter(explode('|', $var)));
extract($result);
Use explode function which can break your string.
$array = explode("|", $var);
print_r($array);
Trying to use the implode() function to add a string at the end of each element.
$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("#txt.att.net,", $array);
print($attUsers);
Prints this:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132
How do I get implode() to also append the glue for the last element?
Expected output:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132#txt.att.net
//^^^^^^^^^^^^ See here
There is a simpler, better, more efficient way to achieve this using array_map and a lambda function:
$numbers = ['9898549130', '9898549131', '9898549132'];
$attUsers = implode(
',',
array_map(
function($number) {
return($number . '#txt.att.net');
},
$numbers
)
);
print_r($attUsers);
This seems to work, not sure its the best way to do it:
$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("#txt.att.net,", $array) . "#txt.att.net";
print($attUsers);
Append an empty string to your array before imploding.
But then we have another problem, a trailing comma at the end.
So, remove it.
Input:
$array = array('9898549130', '9898549131', '9898549132', '');
$attUsers = implode("#txt.att.net,", $array);
$attUsers = rtrim($attUsers, ",")
Output:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132#txt.att.net
This was an answer from my friend that seemed to provide the simplest solution using a foreach.
$array = array ('1112223333', '4445556666', '7778889999');
// Loop over array and add "#att.com" to the end of the phone numbers
foreach ($array as $index => &$phone_number) {
$array[$index] = $phone_number . '#att.com';
}
// join array with a comma
$attusers = implode(',',$array);
print($attusers);
$result = '';
foreach($array as $a) {
$result = $result . $a . '#txt.att.net,';
}
$result = trim($result,',');
There is a simple solution to achieve this :
$i = 1;
$c = count($array);
foreach ($array as $key => $val) {
if ($i++ == $c) {
$array[$key] .= '#txt.att.net';
}
}
I'm trying to figure out how I can use the values an indexed array as path for another array. I'm exploding a string to an array, and based on all values in that array I'm looking for a value in another array.
Example:
$haystack['my']['string']['is']['nested'] = 'Hello';
$var = 'my#string#is#nested';
$items = explode('#', $var);
// .. echo $haystack[... items..?]
The number of values may differ, so it's not an option to do just $haystack[$items[0][$items[1][$items[2][$items[3]].
Any suggestions?
You can use a loop -
$haystack['my']['string']['is']['nested'] = 'Hello';
$var = 'my#string#is#nested';
$items = explode('#', $var);
$temp = $haystack;
foreach($items as $v) {
$temp = $temp[$v]; // Store the current array value
}
echo $temp;
DEMO
You can use a loop to grab each subsequent nested array. I.e:
$haystack['my']['string']['is']['nested'] = 'Hello';
$var = 'my#string#is#nested';
$items = explode('#', $var);
$val = $haystack;
foreach($items as $key){
$val = $val[$key];
}
echo $val;
Note that this does no checking, you likely want to check that $val[$key] exists.
Example here: http://codepad.org/5ei9xS91
Or you can use a recursive function:
function extractValue($array, $keys)
{
return empty($keys) ? $array : extractValue($array[array_shift($keys)], $keys) ;
}
$haystack = array('my' => array('string' => array('is' => array('nested' => 'hello'))));
echo extractValue($haystack, explode('#', 'my#string#is#nested'));
I have a string like this:
$string = 'one/two/three/four';
which I turn it into a array:
$keys = explode('/', $string);
This array can have any number of elements, like 1, 2, 5 etc.
How can I assign a certain value to a multidimensional array, but use the $keys I created above to identify the position where to insert?
Like:
$arr['one']['two']['three']['four'] = 'value';
Sorry if the question is confusing, but I don't know how to explain it better
This is kind of non-trivial because you want to nest, but it should go something like:
function insert_using_keys($arr, $keys, $value){
// we're modifying a copy of $arr, but here
// we obtain a reference to it. we move the
// reference in order to set the values.
$a = &$arr;
while( count($keys) > 0 ){
// get next first key
$k = array_shift($keys);
// if $a isn't an array already, make it one
if(!is_array($a)){
$a = array();
}
// move the reference deeper
$a = &$a[$k];
}
$a = $value;
// return a copy of $arr with the value set
return $arr;
}
$string = 'one/two/three/four';
$keys = explode('/', $string);
$arr = array(); // some big array with lots of dimensions
$ref = &$arr;
while ($key = array_shift($keys)) {
$ref = &$ref[$key];
}
$ref = 'value';
What this is doing:
Using a variable, $ref, to keep track of a reference to the current dimension of $arr.
Looping through $keys one at a time, referencing the $key element of the current reference.
Setting the value to the final reference.
You'll need to first make sure the key's exist, then assign the value. Something like this should work (untested):
function addValueByNestedKey(&$array, $keys, $value) {
$branch = &$array;
$key = array_shift($keys);
// add keys, maintaining reference to latest branch:
while(count($keys)) {
$key = array_pop($keys);
if(!array_key_exists($key, $branch) {
$branch[$key] = array();
}
$branch = &$branch[$key];
}
$branch[$key] = $value;
}
// usage:
$arr = array();
$keys = explode('/', 'one/two/three/four');
addValueByNestedKey($arr, $keys, 'value');
it's corny but:
function setValueByArrayKeys($array_keys, &$multi, $value) {
$m = &$multi
foreach ($array_keys as $k){
$m = &$m[$k];
}
$m = $value;
}
$arr['one']['two']['three']['four'] = 'value';
$string = 'one/two/three/four';
$ExpCheck = explode("/", $string);
$CheckVal = $arr;
foreach($ExpCheck AS $eVal){
$CheckVal = $CheckVal[$eVal]??false;
if (!$CheckVal)
break;
}
if ($CheckVal) {
$val =$CheckVal;
}
this will give u your value in array.