Im trying to do json encode via the CLI, I can get json decode. It is important to pass via STDIN as I need to perform further actions on the data encoded but im starting to wonder is this possible to do in a one liner
So far I have tried:
echo -n '<?php array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); ?>' | php -r "echo json_encode(file_get_contents('php://stdin'));"
and
php -r '<?php array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); ?>' | php -r "echo json_encode(file_get_contents('php://stdin'));"
How about:
php -r "echo json_encode( array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5) );"
Which resulted in the following in PHP 7.1.8 cli:
{"a":1,"b":2,"c":3,"d":4,"e":5}
Related
This question already has answers here:
PHP - Check if two arrays are equal
(19 answers)
Check if two arrays have the same values (regardless of value order) [duplicate]
(13 answers)
How to check if PHP associative arrays are equal, ignoring key ordering?
(1 answer)
Closed 4 years ago.
I'm trying to match 2 arrays that look like below.
$system = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$public = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
My problem is, I need the array keys of both arrays to be the same value and same count.
Which means:
// passes - both arrays have the same key values and same counts of each key
$system = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$public = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
// fails - $public does not have 'blue' => 1
$system = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$public = array('red' => 2, 'green' => 3, 'purple' => 4);
// should fail - $public has 2 'blue' => 1
$system = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$public = array('blue' => 1, 'blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
I've tried using array_diff_keys, array_diff and other php functions, but none can catch extra keys with the same value (i.e. if 'blue' => 1, is repeated it still passes)
What's a good way to solve this?
When you write two values with same key in PHP, the second one will overwrite the value from the first (and this is not an error). Below is what I did on the PHP interactive CLI (run it with php -a):
php > $x = ["x" => 1, "x" => 2, "y" => 2];
php > var_dump($x);
array(2) {
["x"]=>
int(2)
["y"]=>
int(2)
}
So array_diff seems to be working correctly. You are just expecting PHP to behave in a different way than it actually does!
How is it possible to pass json string to cookie?
I have something like this in my Subscriber folder in shopware plugin:
$arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
$this->setCookie($controller,json_encode($arr));
But it stores the following string:
%7B%22a%22%3A1%2C%22b%22%3A2%2C%22c%22%3A3%2C%22d%22%3A4%2C%22e%22%3A5%7D
I know that the problem is in php-json connection.
After hours of experimentations and readings, I cannot find a solution to this problem:
I want to do a MongoDB->find($query) with multiple AND conditions.
For instance, say I want id = 5 and a < 6 and a > 2 and b > 10 and b < 20
I was expecting $query to be:
$query = array("id" => 5,
"a" => array('$gt' => 2,
'$lt' => 6),
"b" => array('$gt' => 10,
'$lt' => 20))
But this returns empty results with my DB
I tried various syntaxes such as:
$query = array("id" => 5,
array( "a" => array('$gt' => 2,
'$lt' => 6),
"b" => array('$gt' => 10,
'$lt' => 20)))
But this fails too.
Also tried with "$AND" variants, no luck.
Is it possible to "mix" several AND conditions in PHP-MongoDB find() requests?
I've just tested this using MongoDB PHP driver v1.6.11 (PHP-5.5.9). The test data are as below
db.collection.insert({id:5, a:4, b:15})
db.collection.insert({id:9, a:4, b:15})
db.collection.insert({id:5, a:4, b:20})
Using PHP code snippet:
$condition = array(
'$and' => array(
array(
"id" => 5,
"a" => array('$gt' => 2, '$lt' => 6),
"b" => array('$gt' => 10, '$lt' => 20)
)
)
);
$docs = $coll->find($condition);
foreach( $docs as $o=> $doc) {
echo json_encode($doc);
}
The above returns only the first document sample. This indicates that $and should work as expected. I've also tested without $and, i.e. :
$condition = array(
"id" => 5,
"a" => array('$gt' => 2, '$lt' => 6),
"b" => array('$gt' => 10, '$lt' => 20)
);
Which also works the same. Try checking your dataset, whether there is a document matching your criteria.
This issue is closed: bad value types in the DB (string instead of float/double). Works as expected when updating to correct types in DB.
It seems that arrays sorted before comparing each other inside array_diff_uassoc.
What is the benefit of this approach?
Test script
function compare($a, $b)
{
echo("$a : $b\n");
return strcmp($a, $b);
}
$a = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
$b = array('v' => 1, 'w' => 2, 'x' => 3, 'y' => 4, 'z' => 5);
var_dump(array_diff_uassoc($a, $b, 'compare'));
$a = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
$b = array('d' => 1, 'e' => 2, 'f' => 3, 'g' => 4, 'h' => 5);
var_dump(array_diff_uassoc($a, $b, 'compare'));
$a = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
$b = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
var_dump(array_diff_uassoc($a, $b, 'compare'));
$a = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
$b = array('e' => 5, 'd' => 4, 'c' => 3, 'b' => 2, 'a' => 1);
var_dump(array_diff_uassoc($a, $b, 'compare'));
http://3v4l.org/DKgms#v526
P.S. it seems that sorting algorithm changed in php7.
Sorting algorithm didn't change in PHP 7. Elements are just passed in another order to the sorting algorithm for some performance improvements.
Well, benefit could be an eventual faster execution. You really hit worst case when both arrays have completely other keys.
Worst case complexity is twice sorting the arrays and then comparisons of each key of the two arrays. O(n*m + n * log(n) + m * log(m))
Best case is twice sorting and then just as many comparisons as there are elements in the smaller array. O(min(m, n) + n * log(n) + m * log(m))
In case of a match, you wouldn't have to compare against the full array again, but only from the key after the match on.
But in current implementation, the sorting is just redundant. Implementation in php-src needs some improvement I think. There's no outright bug, but implementation is just bad. If you understand some C: http://lxr.php.net/xref/PHP_TRUNK/ext/standard/array.c#php_array_diff
(Note that that function is called via php_array_diff(INTERNAL_FUNCTION_PARAM_PASSTHRU, DIFF_ASSOC, DIFF_COMP_DATA_INTERNAL, DIFF_COMP_KEY_USER); from array_diff_uassoc)
Theory
Sorting allows for a few shortcuts to be made; for instance:
A | B
-------+------
1,2,3 | 4,5,6
Each element of A will only be compared against B[0], because the other elements are known to be at least as big.
Another example:
A | B
-------+-------
4,5,6 | 1,2,6
In this case, the A[0] is compared against all elements of B, but A[1] and A[2] are compared against B[2] only.
If any element of A is bigger than all elements in B you will get the worst performance.
Practice
While the above works well for the standard array_diff() or array_udiff(), once a key comparison function is used it will resort to O(n * m) performance because of this change while trying to fix this bug.
The aforementioned bug describes how custom key comparison functions can cause unexpected results when used with arrays that have mixed keys (i.e. numeric and string key values). I personally feel that this should've been addressed via the documentation, because you would get equally strange results with ksort().
I ran into an issue with a data feed I need to import where for some reason the feed producer has decided to provide data that should clearly be either INT or FLOAT as strings-- like this:
$CASES_SOLD = "THREE";
$CASES_STOCKED = "FOUR";
Is there a way in PHP to interpret the text string as the actual integer?
EDIT: I should be more clear-- I need to have the $cases_sold etc. as an integer-- so I can then manipulate them as digits, store in database as INT, etc.
Use an associative array, for example:
$map = array("ONE" => 1, "TWO" => 2, "THREE" => 3, "FOUR" => 4);
$CASES_SOLD = $map["THREE"]; // 3
If you are only interested by "converting" one to nine, you may use the following code:
$convert = array('one' => 1,
'two' => 2,
'three' => 3,
'four' => 4,
'five' => 5,
'six' => 6,
'seven' => 7,
'eight' => 8,
'nine' => 9
);
echo $convert[strtolower($CASES_SOLD)]; // will display 3
If you only need the base 10 numerals, just make a map
$numberMap = array(
'ONE' => 1
, 'TWO' => 2
, 'THREE' => 3
// etc..
);
$number = $numberMap[$CASES_SOLD];
// $number == 3'
If you need something more complex, like interpreting Four Thousand Two Hundred Fifty Eight into 4258 then you'll need to roll up your sleeves and look at this related question.
Impress your fellow programmers by handling this in a totally obtuse way:
<?php
$text = 'four';
if(ereg("[[.$text.]]", "0123456789", $m)) {
$value = (int) $m[0];
echo $value;
}
?>
You need a list of numbers in english and then replace to string, but, you should play with 'thousand' and 'million' clause where must check if after string 'thousend-three' and remove integer from string.
You should play with this function and try change if-else and add some functionality for good conversion:
I'm writing now a simple code for basic, but you know others what should change, play!
Look at million, thousand and string AND, it should be change if no in string like '1345'. Than replace with str_replace each of them separaterly and join them to integer.
function conv($string)
{
$conv = array(
'ONE' => 1,
'TWO' => 2,
'THREE' => 3,
'FOUR' => 4,
'FIVE' => 5,
'SIX' => 6,
'SEVEN' => 7,
'EIGHT' => 8,
'NINE' => 9,
'TEN' => 10,
'ELEVEN' => 11,
'TWELVE' => 12,
'THIRTEEN' => 13,
'FOURTEEN' => 14,
'FIFTEEN' => 15,
'SIXTEEN' => 16,
'SEVENTEEN' => 17,
'EIGHTEEN' => 18,
'NINETEEN' => 19,
'TWENTY' => 20,
'THIRTY' => 30,
'FORTY' => 40,
'FIFTY' => 50,
'SIXTY' => 60,
'SEVENTY' => 70,
'EIGTHY' => 80,
'NINETY' => 90,
'HUNDRED' => 00,
'AND' => '',
'THOUSAND' => 000
'MILLION' => 000000,
);
if (stristr('-', $string))
{
$val = explode('-', $string);
#hardcode some programming logic for checkers if thousands, should if trim zero or not, check if another values
foreach ($conv as $conv_k => $conv_v)
{
$string[] = str_replace($conv_k, $conv_v, $string);
}
return join($string);
}
else
{
foreach ($conv as $conv_k => $conv_v)
{
$string[] = str_replace($conv_k, $conv_v, $string);
}
return join($string);
}
}
Basically what you want is to write a parser for the formal grammar that represents written numbers (up to some finite upper bound). Depending on how high you need to go, the parser could be as trivial as
$numbers = ('zero', 'one', 'two', 'three');
$input = 'TWO';
$result = array_search(strtolower($input), $numbers);
...or as involved as a full-blown parser generated by a tool as ANTLR. Since you probably only need to process relatively small numbers, the most practical solution might be to manually hand-code a small parser. You can take a look here for the ready-made grammar and implement it in PHP.
This is similar to Converting words to numbers in PHP
PHP doesn't have built in conversion functionality. You'd have to build your own logic based on switch statements or otherwise.
Or use an existing library like:
http://www.phpclasses.org/package/7082-PHP-Convert-a-string-of-English-words-to-numbers.html