Suppose I've got the following string:
) [6] => Array ( [2014-05-05 00:0] => My actual content
If I want to only be left with My actual content at the end, what is the best way to split the entire string?
Note: the words My actual content are and can change. I'm hoping to cut the string based on the second => string as this will be present at all times.
It seems you're just looking to find the first value of an array with keys you do not know. This is super simple:
Consider the following array:
$array = array(
'2014-05-22 13:36:00' => 'foo',
'raboof' => 'eh',
'qwerty' => 'value',
'8838277277272' => 'test'
);
Method #1:
Will reset the array pointer to the first element and return it.
Using reset:
var_dump( reset($array) ); //string(3) "foo"
DEMO
Method #2:
Will reset the entire array to use keys of 0, 1, 2, 3...etc. Useful if you need to get more than one value.
Using array_values:
$array = array_values($array);
var_dump( $array[0] ); //string(3) "foo"
DEMO
Method #2.5:
Will reset the entire array to use keys of 0, 1, 2, 3...etc and select the first one into the $content variable. Useful if you need to get more than one value into variables straight away.
Using list and array_values:
list( $content ) = array_values($array);
var_dump( $content ); //string(3) "foo"
DEMO
Method #3:
Arrays are iteratable, so you could iterate through it but break out immediately after the first value.
Using a foreach loop but break immediatly:
foreach ($array as $value) {
$content = $value;
break;
}
var_dump($content); //string(3) "foo"
DEMO
To Answer your question, on extracting from a string based on last 'needle'...
Okay, this is quite an arbitrary question, since it seems like you're showing us the results from a print_r(), and you could reference the array key to get the result.
However, you mentioned "... at the end", so I'm assuming My actual content is actually right at the end of your "String".
In which case there's a very simple solution. You could use: strrchr from the PHP manual - http://www.php.net/manual/en/function.strrchr.php.
So you're looking at this: strrchr($string, '=>');
Hope this answers your question. Advise otherwise if not please.
you have to use foreach loop in a foreach to get the multi dimentional array values.
foreach($value as $key){
foreach($key as $val){
echo $val;
}
}
Related
Here's an array:
array('csv'=>
array('path'=>'/file.csv',
'lines'=>array('line1',
'line2',
'line3'
)
)
)
As you can see, the array goes three levels deep.
Here are two strings:
1. 'csv/path'
2. 'csv/lines/0
Using / as the delimiter, string 1 will get '/file.csv' and string 2 will get 'line1'. I've been thinking about using a recursive function, but I just don't know yet how to go about it.
The idea is I won't know which array key I'm accessing. I'm working on creating a generic function that will take a string as input and return the respective value in the array.
Demo
Just iterate through each key from the string given, setting the new array to pull from as the found element in the given array. You should add error handling.
<?php
$array = array('csv'=>
array('path'=>'/file.csv',
'lines'=>array('line1',
'line2',
'line3'
)
)
);
echo extractData($array, 'csv/path'); // echoes /file.csv
echo extractData($array, 'csv/lines/0'); // echoes line1
function extractData($array, $string){
$keys = explode('/', $string);
$data = $array;
foreach ($keys as $key){
$data = $data[$key];
}
return $data;
}
I am new PHP question and I am trying to create an array from the following string of data I have. I haven't been able to get anything to work yet. Does anyone have any suggestions?
my string:
Acct_Status=active,signup_date=2010-12-27,acct_type=GOLD,profile_range=31-35
I want to dynamically create an array called "My_Data" and have id display something like my following, keeping in mind that my array could return more or less data at different times.
My_Data
(
[Acct_Status] => active
[signup_date] => 2010-12-27
[acct_type] => GOLD
[profile_range] => 31-35
)
First time working with PHP, would anyone have any suggestions on what I need to do or have a simple solution? I have tried using an explode, doing a for each loop, but either I am way off on the way that I need to do it or I am missing something. I am getting something more along the lines of the below result.
Array ( [0] => Acct_Status=active [1] => signup_date=2010-12-27 [2] => acct_type=GOLD [3] => profile_range=31-35} )
You would need to explode() the string on , and then in a foreach loop, explode() again on the = and assign each to the output array.
$string = "Acct_Status=active,signup_date=2010-12-27,acct_type=GOLD,profile_range=31-35";
// Array to hold the final product
$output = array();
// Split the key/value pairs on the commas
$outer = explode(",", $string);
// Loop over them
foreach ($outer as $inner) {
// And split each of the key/value on the =
// I'm partial to doing multi-assignment with list() in situations like this
// but you could also assign this to an array and access as $arr[0], $arr[1]
// for the key/value respectively.
list($key, $value) = explode("=", $inner);
// Then assign it to the $output by $key
$output[$key] = $value;
}
var_dump($output);
array(4) {
["Acct_Status"]=>
string(6) "active"
["signup_date"]=>
string(10) "2010-12-27"
["acct_type"]=>
string(4) "GOLD"
["profile_range"]=>
string(5) "31-35"
}
The lazy option would be using parse_str after converting , into & using strtr:
$str = strtr($str, ",", "&");
parse_str($str, $array);
I would totally use a regex here however, to assert the structure a bit more:
preg_match_all("/(\w+)=([\w-]+)/", $str, $matches);
$array = array_combine($matches[1], $matches[2]);
Which would skip any attributes that aren't made up of letters, numbers or hypens. (The question being if that's a viable constraint for your input of course.)
$myString = 'Acct_Status=active,signup_date=2010-12-27,acct_type=GOLD,profile_range=31-35';
parse_str(str_replace(',', '&', $myString), $myArray);
var_dump($myArray);
All I need to two is remove the final two elements from an array, which only contains 3 elements, output those two removed elements and then output the non-removed element. I'm having trouble removing the two elements, as well as keeping their keys.
My code is here http://pastebin.com/baV4fMxs
It is currently outputting : Java
Perl
Array
I want it to output:
[One] => Perl and [Two] => Java
[Zero] => PHP
$last=array_splice($inputarray,-1);
//$last has now key=>value of last element
$middle=array_splice($inputarray,-1);
//$middle has now key=>value of middle element
//$inputarray has now only key=>value of first element
It seems to me that you want to retrieve those two values being removed before getting rid of them. With this in mind, I suggest the use of array_pop() which simultaneously returns the last item in the array and removes it from the array.
$val = array_pop($my_array);
echo $val; // Last value
$val = array_pop($my_array);
echo $val; // Middle value
// Now, $my_array has only the first value
You mentioned keys, so I assume it's an associative array. In order to remove an element, you can call the unset function, like this:
unset ($my_array['my_key'])
Do this for both elements that you want to remove.
array_pop will do it for you quite easily:
$array = array( 'one', 'two', 'three');
$last = array_pop( $array); echo $last . "\n";
$second = array_pop( $array); echo $second . "\n";
echo $array[0];
Output:
three
two
one
Demo
My aim is to find out what the operator is, and where it was in the original $operatorArray (which contains the various operators such as "+", "-" etc... )
So I have managed to check when $operator matches with another operator in my existing $operatorArray, however I need to know where in $operatorArray it is found.
foreach ($_SESSION['explodedQ'] as $operator){ //search through the user input for the operator.
if (in_array("$operator", $operatorArray)) { //if the operator that we found is in the array, then tell us what it is
print_r("$operator"); //prints the operator found
print_r("$positionNumber"); //prints where the operator is
} //if operator
else{
$positionNumber++; //The variable which keeps count on where the array is searching.
}
I've tried Google/Stack searching, but the thing is, I don't actually know what to Google search. I've searched for things like "find index from in_array" etc... and I can't see how to do it. If you could provide me with a simple way to understand how to achieve this, I would be greatful. Thanks for your time.
array_search will do what you are looking for
Taken straight from the PHP manual:
array_search() - Searches the array for a given value and returns the corresponding key if successful
If you're searching a non-associative array, it returns the corresponding key, which is the index you're looking for. For non-consecutively indexed arrays (i.e. array(1 => 'Foo', 3 => 'Bar', ...)) you can use the result of array_values() and search in it.
You might want to give this a try
foreach($_SESSION['explodedQ'] as $index => $operator) { /* your stuff */ }
That way you can print the $index as soon as your in_array() hits the right $operator.
i think you need array_search()
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array); // $key = 1;
Use:
$key = array_search($operator, $array);
Having a brain freeze over a fairly trivial problem. If I start with an array like this:
$my_array = array(
'monkey' => array(...),
'giraffe' => array(...),
'lion' => array(...)
);
...and new elements might get added with different keys but always an array value. Now I can be sure the first element is always going to have the key 'monkey' but I can't be sure of any of the other keys.
When I've finished filling the array I want to move the known element 'monkey' to the end of the array without disturbing the order of the other elements. What is the most efficient way to do this?
Every way I can think of seems a bit clunky and I feel like I'm missing something obvious.
The only way I can think to do this is to remove it then add it:
$v = $my_array['monkey'];
unset($my_array['monkey']);
$my_array['monkey'] = $v;
array_shift is probably less efficient than unsetting the index, but it works:
$my_array = array('monkey' => 1, 'giraffe' => 2, 'lion' => 3);
$my_array['monkey'] = array_shift($my_array);
print_r($my_array);
Another alternative is with a callback and uksort:
uksort($my_array, create_function('$x,$y','return ($y === "monkey") ? -1 : 1;'));
You will want to use a proper lambda if you are using PHP5.3+ or just define the function as a global function regularly.
I really like #Gordon's answer for its elegance as a one liner, but it only works if the targeted key exists in the first element of the array. Here's another one-liner that will work for a key in any position:
$arr = ['monkey' => 1, 'giraffe' => 2, 'lion' => 3];
$arr += array_splice($arr, array_search('giraffe', array_keys($arr)), 1);
Demo
Beware, this fails with numeric keys because of the way that the array union operator (+=) works with numeric keys (Demo).
Also, this snippet assumes that the targeted key is guaranteed to exist in the array. If the targeted key does not exist, then the result will incorrectly move the first element to the end because array_search() will return false which will be coalesced to 0 by array_splice() (Demo).
You can implement some basic calculus and get a universal function for moving array element from one position to the other.
For PHP it looks like this:
function magicFunction ($targetArray, $indexFrom, $indexTo) {
$targetElement = $targetArray[$indexFrom];
$magicIncrement = ($indexTo - $indexFrom) / abs ($indexTo - $indexFrom);
for ($Element = $indexFrom; $Element != $indexTo; $Element += $magicIncrement){
$targetArray[$Element] = $targetArray[$Element + $magicIncrement];
}
$targetArray[$indexTo] = $targetElement;
}
Check out "moving array elements" at "gloommatter" for detailed explanation.
http://www.gloommatter.com/DDesign/programming/moving-any-array-elements-universal-function.html