I've been searching and searching and can't find anything that works, but this is what I want to do.
This code:
try{
$timeout = 2;
$scraper = new udptscraper($timeout);
$ret = $scraper->scrape('udp://tracker.openbittorrent.com:80',array('0D7EA7F06E07F56780D733F18F46DDBB826DCB65'));
print_r($ret);
}catch(ScraperException $e){
echo('Error: ' . $e->getMessage() . "<br />\n");
echo('Connection error: ' . ($e->isConnectionError() ? 'yes' : 'no') . "<br />\n");
}
Outputs this:
Array ( [0D7EA7F06E07F56780D733F18F46DDBB826DCB65] => Array ( [seeders] => 148 [completed] => 10 [leechers] => 20 [infohash] => 0D7EA7F06E07F56780D733F18F46DDBB826DCB65 ) )
And I want that seeder count into a string such as $seeds. How would I go about doing this?
Something like this?
$seeds = $ret['0D7EA7F06E07F56780D733F18F46DDBB826DCB65']['seeders'];
you can user strval() to convert a number to a string.
$string = strval($number);
or you can cast it into a string:
$string = (string)$number;
in your context that would be:
$string = strval($ret['0D7EA7F06E07F56780D733F18F46DDBB826DCB65']['seeders']);
However that odd string is also the first index of the array so you could also do it like this:
$string = strval($ret[0]['seeders']);
or if you want ot use only indexes ('seeders' is also the first index of the second array):
$string = strval($ret[0][0]);
if you just want the number then it's easy too:
$num = $ret[0][0];
It's not clear if you're looking to assign the array value(s?) as a separate variable(s?) or just to cast it into a string. Here's a nice way to accomplish all the above options, by assigning each array key as a separate variable with the matching array value:
$ret_vars = array_pop($ret);
foreach ($ret_vars as $variable_name=>$variable_value) :
${$variable_name} = (string)$variable_value;
endforeach;
In your original example, this would end up populating $seeders, $completed, $leechers and $infohash with their matching string values. Of course, make sure these variable names are not used/needed elsewhere in the code. If that's the case, simply add some sort of unique prefix to the ${} construct, like ${'ret_'.$variable_name}
Related
$data = json_decode(file_get_contents("php://input"));
$Formula = $data->Formula; //getting value ($N-$D)*100.
$N = $data->Numerator; //getting value 100
$D = $data->Denominator; //getting value 20
I am getting JSON values like the above way. I want to inject $N,$D values to the variable of $Formula value. I want Output like below : (100-20)*100 = 8000
First of all;
Caution
The eval() language construct is very dangerous because it allows execution of arbitrary PHP code.
Sharing my solution, using:
array_combine, array_map and array_keys to prefix all the keys with an $
Fastest way to add prefix to array keys?
Keep in mind that this expects a formula were all the variables exist in $data
strtr to replace $N with $data->N
eval() to calculate the string: calculate math expression from a string using eval
Code:
<?php
// Original data
$data = (Object) [
'formula' => '($N-$D)*100',
'N' => 100,
'D' => 20
];
// Create an object were 'N => 100' is saved as '$N => 100'
$ovars = get_object_vars($data);
$ovars = array_combine(array_map(function($k){ return '$' . $k; }, array_keys($ovars)), $ovars);
// Replace (oa) $N with $ovars['$N']
$sum = strtr($data->formula, $ovars);
// EVAL
$res = eval('return ' . $sum . ';');
// Show result
echo "SUM: $sum\nRESULT: $res";
Result:
SUM: (100-20)*100
RESULT: 8000
Hi I have this array called $allextensionsforque. See print_r below.
Array ( [0] => Local/101#from-queue/n,0 [data] => Local/101#from-queue/n,0 )
I'm trying a foreach like below but its not showing any data on the echo. Can anyone help?
$allextensionsforqueu = mysqli_query($conqueue,"SELECT data FROM queues_details WHERE id = '1' AND keyword ='member'");
$allextensionsforque = mysqli_fetch_array($allextensionsforqueu);
$foo = "";
foreach ($allextensionsforque as $extensionrow)
{
$extensionrowstriped = substr($extensionrow['data'],6,3);
$foo = "' " . $extensionrowstriped . " ' ,";
}
echo $foo;
You don't have an array in $extensionrow, since it's only an one dimensional array. So you just need to replace $extensionrowstriped = substr($extensionrow['data'],6,3); with $extensionrowstriped = substr($extensionrow,6,3);.
Check for errors using mysqli_error(). Here is a simple approach, but you may want to improve it for production use:
$allextensionsforqueu = mysqli_query($conqueue,"...") or die(mysqli_error($conqueue));
Next, append your data to $foo instead of overwritting it in each loop:
$foo .= "' " . $extensionrowstriped . " ' ,";
Finally, verify that $extensionrow contains the data that you expect. substr() will return false if a match is not found.
I am creating lines of text to be consumed by another layer in my application. The lines are:
['Jun 13',529],
['Jul 13',550],
['Aug 13',1005],
['Sep 13',1021],
['Oct 13',1027],
What is the fastest/easiest way to remove the trailing comma from the last line of text?
I'm expecting something like this:
['Jun 13',529],
['Jul 13',550],
['Aug 13',1005],
['Sep 13',1021],
['Oct 13',1027]
Actual Code:
$i = 0;
while($graph_data = $con->db_fetch_array($graph_data_rs))
{
$year = $graph_data['year'];
$month = $graph_data['month'];
$count = $graph_data['count'];
$total_count = $graph_data['total_count'];
// for get last 2 digits of year
$shortYear = substr($year, -2, 2);
// for get month name in Jan,Feb format
$timestamp = mktime(0, 0, 0, $month, 1);
$monthName = date('M', $timestamp );
$data1 = "['".$monthName.' '.$shortYear."',".$total_count."],";
$i++;
}
If you have that array in a variable and want a string, you can use implode to get a string separated by a glue char.
If you already have an string, you can use rtrim to remove the last char to the right of the string.
If you have an array, where the value is a string ['Oct 13',1027] (ending in a comma), you have the same options above and:
You can use array_walk with some of the mentioned functions
You can get the last element, and use rtrim on it like the code below:
Example of code using rtrim on a array of strings:
<?php
$values = array("['Oct 13',1027],", "['Oct 13',1027],");
$lastIndex = count($values)-1;
$lastValue = $values[$lastIndex];
$values[$lastIndex] = rtrim($lastValue, ',');
<?php
$arr = array(
"['Jun 13',529],",
"['Jul 13',550],"
);
$arr[] = rtrim(array_pop($arr), ', \t\n\r');
print_r($arr);
// output:
// Array
// (
// [0] => ['Jun 13',529],
// [1] => ['Jul 13',550]
// )
Make it an actual array, and implode. Not really sure what is is going to be (if json:you can do even better and not make the values themselves fake-arrays, but this is left as an exersize to the reader).
$yourData = array();
while(yourloop){
//probaby something like: $yourData = array($monthName=>$total_count);
$yourData[] = "['".$monthName.' '.$shortYear."',".$total_count."]";
}
//now you have an actual array with that data, instead of a fake-array that's a string.
//recreate your array like so:
$data1 = implode(','$yourData);
//or use json_encode.
Something similar to #srain but using array_push.
$values = array("['Oct 13',1027],", "['Oct 13',1027],");
$last = array_pop($values); //pop last element
array_push( $values, rtrim($last, ',') ); //push it by removing comma
var_dump($values);
//output
/*
array
0 => string '['Oct 13',1027],' (length=16)
1 => string '['Oct 13',1027]' (length=15)
*/
#ElonThan was right and so was #BenFortune. This is an XY Problem, and none of the other answers are giving you the best advice -- "Never craft your own json string manually".
You think you just need to remove the final comma from your textual output so that it creates something that javascript can parse as an indexed array of indexed arrays.
What you should be doing is creating a multidimensional array then converting that data into a json string. PHP has a native function that does exactly this AND it guarantees that you will have a valid json string (because it will escape characters as needed).
I'll demonstrate how to adjust your script based on your while() loop.
$result = [];
while ($row = $con->db_fetch_array($graph_data_rs)) {
$result[] = [
date('M y', strtotime($row['year'] . '-' . $row['month'])),
$row['total_count']
];
}
echo json_encode($result, JSON_PRETTY_PRINT);
Here is an online demo that re-creates your query's result set as an input array, then replicates the loop and result generation. https://3v4l.org/cG66l
Then all you have to do is echo that string into your rendered html document's javascript where required.
I'm working on a php function that will compare the components of two arrays. Each value in the arrays are only one english word long. No spaces. No characters.
Array #1: a list of the most commonly used words in the english
language. $common_words_array
Array #2: a user-generated sentence, converted to lowercase, stripped
of punctuation, and exploded() using the space (" ") as a delimiter.
$study_array
There's also a $com_study array, which is used in this case to keep
track of the order of commonly used words which get replaced in the
$study_array by a "_" character.
Using nested for loops, what SHOULD happen is that the script should compare each value in Array #2 to each value in Array #1. When it finds a match (aka. a commonly used english word), it will do some other magic that's irrelevant to the current problem.
As of right now, PHP doesn't recognize when two array string values are equivalent. I'm adding in the code to the problematic function here for reference. I've added in a lot of unnecessary echo commands in order to localize the problem to the if statement.
Can anybody see something that I've missed? The same algorithm worked perfectly in Python.
function create_question($study_array, $com_study, $common_words_array)
{
for ($study=0; $study<count($study_array); $study++)
{
echo count($study_array)." total in study_array<br>";
echo "study is ".$study."<br>";
for ($common=0; $common<count($common_words_array); $common++)
{
echo count($common_words_array)." total in common_words_array<br>";
echo "common is ".$common."<br>";
echo "-----<br>";
echo $study_array[$study]." is the study list word<br>";
echo $common_words_array[$common]." is the common word<br>";
echo "-----<br>";
// The issue happens right here.
if ($study_array[$study] == $common_words_array[$common])
{
array_push($com_study, $study_array[$study]);
$study_array[$study] = "_";
print_r($com_study);
print_r($study_array);
}
}
}
$create_question_return_array = array();
$create_question_return_array[0] = $study_array;
$create_question_return_array[1] = $com_study;
return $create_question_return_array;
}
EDIT: At the suggestion of you amazing coders, I've updated the if statement to be much more simple for purposes of debugging. See below. Still having the same issue of not activating the if statement.
if (strcmp($study_array[$study],$common_words_array[$common])==0)
{
echo "match found";
//array_push($com_study, $study_array[$study]);
//$study_array[$study] = "_";
//print_r($com_study);
//print_r($study_array);
}
EDIT: At bansi's request, here's the main interface snippet where I'm calling the function.
$testarray = array();
$string = "This is a string";
$testarray = create_study_string_array($string);
$testarray = create_question($testarray, $matching, $common_words_array);
As for the result, I'm just getting a blank screen. I would expect to have the simplified echo statement output "match found" to the screen, but that's not happening.
(EDIT) make sure your that your splitting function removes excess whitespace (e.g. preg_split("\\s+", $input)) and that the input is normalized properly (lowercase'd, special chars stripped out, etc.).
On mobile and can't seem to copy text. You forgot a dollar sign when accessing the study array in your push command.
change
array_push($com_study, $study_array[study]);
to
array_push($com_study, $study_array[$study]);
// You missed a $ ^ here
Edit:
The following code outputs 3 'match found'. i don't know the values of $common_words_array and $matching, so i used some arbitrary values, also instead of using function create_study_string_array i just used explode. still confused, can't figure out what exactly you are trying to achieve.
<?php
$testarray = array ();
$string = "this is a string";
$testarray = explode ( ' ', $string );
$common_words_array = array (
'is',
'a',
'this'
);
$matching = array (
'a',
'and',
'this'
);
$testarray = create_question ( $testarray, $matching, $common_words_array );
function create_question($study_array, $com_study, $common_words_array) {
echo count ( $study_array ) . " total in study_array<br>";
echo count ( $common_words_array ) . " total in common_words_array<br>";
for($study = 0; $study < count ( $study_array ); $study ++) {
// echo "study is " . $study . "<br>";
for($common = 0; $common < count ( $common_words_array ); $common ++) {
// The issue happens right here.
if (strcmp ( $study_array [$study], $common_words_array [$common] ) == 0) {
echo "match found";
}
}
}
$create_question_return_array = array ();
$create_question_return_array [0] = $study_array;
$create_question_return_array [1] = $com_study;
return $create_question_return_array;
}
?>
Output:
4 total in study_array
3 total in common_words_array
match foundmatch foundmatch found
Use === instead of ==
if ($study_array[$study] === $common_words_array[$common])
OR even better use strcmp
if (strcmp($study_array[$study],$common_words_array[$common])==0)
Use built-in functions wherever possible to avoid unnecessary code and typos. Also, providing sample inputs would be helpful too.
$study_array = array("a", "cat", "sat", "on","the","mat");
$common_words_array = array('the','a');
$matching_words = array();
foreach($study_array as $study_word_index=>$study_word){
if(in_array($study_word, $common_words_array)){
$matching_words[] = $study_word;
$study_array[$study_word_index] = "_";
//do something with matching words
}
}
print_r($study_array);
print_r($matching_words);
Edit: The aim of my method is to delete a value from a string in a database.
I cant seem to find the answer for this one anywhere. Can you concatenate inside a str_replace like this:
str_replace($pid . ",","",$boom);
$pid is a page id, eg 40
$boom is an exploded array
If i have a string: 40,56,12 i want to make it 56,12 however without the concatenator in it will produce:
,56,12
When I have the concat in the str_replace it doesnt do a thing. Is this possible?
Answering your question: yes you can. That code works as you would expect it to.
But this approach is wrong. It will not work for $pid = 12; (last element, without trailing coma) and will incorrectly replace 40, in $boom = '140,20,12';
You should keep it in array, search for unwanted value, if found unset it from the array and then implode with coma.
$boom = array_filter($boom);
$key = array_search($pid, $boom);
if($key !== false){
unset($boom[$key]);
}
$boom = implode(',',$boom);
[+] Your code does not work because $boom is an array, and str_replace operates on string.
As $boom is an array, you don't need to use array on your case.
Change this
$boom = explode(",",$ticket_array);
$boom = str_replace($pid . ",","",$boom);
$together = implode(",",$boom);
to
$together = str_replace($pid . ",","",$ticket_array);
Update: If you want still want to use array
$boom = explode(",",$ticket_array);
unset($boom[array_search($pid, $boom)]);
$together = implode(",",$boom);
After you have edited it becomes clear that you want to remove the value of $pid from the array $boom which contains one number as a value. You can use array_search to find if it is in at if in with which key. You can then unset the element from $boom:
$pid = '40';
$boom = explode(',', '40,56,12');
$r = array_search($pid, $boom, FALSE);
if ($r !== FALSE) {
unset($boom[$r]);
}
Old question:
Can you concatenate inside a str_replace like this: ... ?
Yes you can, see the example:
$pid = '40';
$boom = array('40,56,12');
print_r(str_replace($pid . ",", "", $boom));
Result:
Array
(
[0] => 56,12
)
Which is pretty much like you did so you might be looking for the problem at the wrong place. You can use any string expression for the parameter.
It might be easier for you if you're unsure to create a variable first:
$pid = '40';
$boom = array('40,56,12');
$search = sprintf("%d,", $pid);
print_r(str_replace($search, "", $boom));
You should store your "ticket array" in a separate table.
And use regular SQL queries (UPDATE, DELETE) to manipulate it.
A relational word in the name of your database is for the reason. And you are abusing this smart software with such a barbaric approach.
You could use str_split, it converts a string to an array, then with a foreach loop echo all the values except the first one.
$numbers_string="40,56,12";
$numbers_array = str_split($numbers_string);
//then, when you have the array of numbers, you could echo every number except the first separating them with a comma
foreach ($numbers_array as $key => $value) {
if ($key > 0) {
echo $value . ", ";
}
}
If you want is to skip a value not by it's position in the array, but for it's value then you could do this instead:
$unwanted_value="40";
foreach ($numbers_array as $key => $value) {
if ($value != $unwanted_value) {
echo $value . ", ";
}
else {
unset($numbers_array[$key]);
$numbers_array = array_values($numbers_array);
var_dump($numbers_array);
}
}