I have a string like this,
sidePanel[]=1&sidePanel[]=2&sidePanel[]=4
And if I need to add another value to the string I do this:
$sidePanel = explode('&', $_SESSION['sidePanel']);
array_push($sidePanel, 'sidePanel[]=3');
$sidePanel = implode('&', $sidePanel);
Which returns this:
sidePanel[]=1&sidePanel[]=2&sidePanel[]=4&sidePanel[]3
Now how can I make it so that it will always insert after the array 'sidePanel[]=2' when I explode it at &?
I do not want it in numerical order although this example will return it in numerical order, as the string can change to be in any order.
I cannot use array_splice as I understand this uses the key of the array, and as the position of sidePanel[]=2 can change it will not always be the same.
You can indeed use array_splice, but you have to find the position of your insertion point first:
$sidePanelArr = explode( '&', $_SESSION['sidePanel'] );
// find the position of 'sidePanel[]=2' in array
$p = array_search( 'sidePanel[]=2', $sidePanelArr );
// insert after it
array_splice( $sidePanelArr, p+1, 0, 'sidePanel[]=3' );
$sidePanelSt = implode( '&', $sidePanelArr );
You could also splice the string right into your original string without exploding and re-imploding.
The function substr_replace() is your friend:
$sidePanelSt = $_SESSION['sidePanel'];
// find the position of 'sidePanel[]=2' in string
// (adding '&' to the search string makes sure that 'sidePanel[]=2' does not match 'sidePanel[]=22')
$p = strpos( $sidePanelSt.'&', 'sidePanel[]=2&') + strlen('sidePanel[]=2' );
// insert after it (incl. leading '&')
$sidePanelSt = substr_replace( $sidePanelSt , '&sidePanel[]=3' , $p, 0 );
See : http://codepad.org/5AOXcHPk
<?php
$str = "sidePanel[]=1&sidePanel[]=2&sidePanel[]=4";
$sidePanelArr = explode('&', $str);
$newVal = 'sidePanel[]=3';
$insertAt = 2 ;
$newArr = array_merge(array_slice($sidePanelArr, 0,$insertAt),
array($newVal),
array_slice($sidePanelArr,$insertAt)
);
$sidePanel = implode('&', $newArr);
echo $sidePanel,PHP_EOL ;
?>
You could turn it into an array using parse_str and locate the value you want to insert it after:
// Turn it into an array
$url = parse_str($_SESSION['sidePanel']));
// What value do we want to insert it after
$insert_after = 2;
// The value you want to insert
$sidePanel = 3;
// Find the position of $insert_after
$offset = array_search($insert_after, $url['sidePanel']);
// Slice the array up (based on the value)
$url['sidePanel'] = array_merge(array_slice($url['sidePanel'], 0, $offset),
array($sidePanel),
array_slice($url['sidePanel'], $offset));
// Turn it back into a string
echo http_build_query($url);
Related
I have a long string variable that contains coordinates
I want to keep each coordinate in a separate cell in the array according to Lat and Lon..
For example. The following string:
string = "(33.110029967689556, 35.60865999564635), (33.093492845160036, 35.63955904349791), (33.0916232355565, 35.602995170206896)";
I want this:
arrayX[0] = "33.110029967689556";
arrayX[1] = "33.093492845160036";
arrayX[2] = "33.0916232355565";
arrayY[0] = "35.60865999564635";
arrayY[1] = "35.63955904349791";
arrayY[2] = "35.602995170206896";
Does anyone have an idea ?
Thanks
Use substr to modify sub string, it allow you to do that with a little line of code.
$array_temp = explode('),', $string);
$arrayX = [];
$arrayY = [];
foreach($array_temp as $at)
{
$at = substr($at, 1);
list($arrayX[], $arrayY[]) = explode(',', $at);
}
print_r($arrayX);
print_r($arrayY);
The simplest way is probably to use a regex to match each tuple:
Each number is a combination of digits and .: the regex [\d\.]+ matches that;
Each coordinate has the following format: (, number, ,, space, number,). The regex is \([\d\.]+,\s*[\d\.]+\).
Then you can capture each number by using parenthesis: \(([\d\.]+),\s*([\d\.]+)\). This will produce to capturing groups: the first will contain the X coordinate and the second the Y.
This regex can be used with the method preg_match_all.
<?php
$string = '(33.110029967689556, 35.60865999564635), (33.093492845160036, 35.63955904349791), (33.0916232355565, 35.602995170206896)';
preg_match_all('/\(([\d\.]+)\s*,\s*([\d\.]+)\)/', $string, $matches);
$arrayX = $matches['1'];
$arrayY = $matches['2'];
var_dump($arrayX);
var_dump($arrayY);
For a live example see http://sandbox.onlinephpfunctions.com/code/082e8454486dc568a6557058fef68d6f10c8dbd0
My suggestion, working example here: https://3v4l.org/W99Uu
$string = "(33.110029967689556, 35.60865999564635), (33.093492845160036, 35.63955904349791), (33.0916232355565, 35.602995170206896)";
// Split by each X/Y pair
$array = explode("), ", $string);
// Init result arrays
$arrayX = array();
$arrayY = array();
foreach($array as $pair) {
// Remove parentheses
$pair = str_replace('(', '', $pair);
$pair = str_replace(')', '', $pair);
// Split into two strings
$arrPair = explode(", ", $pair);
// Add the strings to the result arrays
$arrayX[] = $arrPair[0];
$arrayY[] = $arrPair[1];
}
You need first to split the string into an array. Then you clean the value to get only the numbers. Finally, you put the new value into the new array.
<?php
$string = "(33.110029967689556, 35.60865999564635), (33.093492845160036, 35.63955904349791), (33.0916232355565, 35.602995170206896)";
$loca = explode(", ", $string);
$arr_x = array();
$arr_y = array();
$i = 1;
foreach($loca as $index => $value){
$i++;
if ($i % 2 == 0) {
$arr_x[] = preg_replace('/[^0-9.]/', '', $value);
}else{
$arr_y[] = preg_replace('/[^0-9.]/', '', $value);
}
}
print_r($arr_x);
print_r($arr_y);
You can test it here :
http://sandbox.onlinephpfunctions.com/code/4bf04e7aabeba15ecfa114d8951eb771610a43a4
I have a string and a value.
I am exploding the string which returns a few results to a list.
I want to add each of those items from the list to an array, with the same value assigned to each string.
Here is what I have so far:
$count = 3;
$amount = 2500;
$value = ceil ($amount / $count);
$string = "String1, String2, String3, ";
$strings = explode(", ", $string);
I want to run a foreach that puts $strings and $value into an array together.
Any pointers?
You can simply use:
$combo = array_fill_keys( $strings , $value );
// var_dump( $combo ); // to check you got it right.
This takes the values in your $strings array and uses them as the keys for the new $combo array, setting the same value for each key.
I'm not sure how to better phrase my question, but here is my situation.
I have an array like the following:
$temp_array = array("111111-Name1-122874|876394|120972", "222222-Name2-122874|876394|120972", "333333-Name3-122874|876394|120972");
I need to loop through this array and try to match the first portion of each string in the array
e.g.
$id = "222222";
$rand_number = "999888";
if ($id match the first element in string) {
fetch this string
append "999888" to "122874|876394|120972"
insert this string back to array
}
So the resulting array becomes:
$temp_array = array("111111-Name1-122874|876394|120972", "222222-Name2-999888|122874|876394|120972", "333333-Name3-122874|876394|120972");
Sorry if my question appears confusing, but it really is pretty difficult for me to even grasp some of the required operations.
Thanks
Try this:
$temp_array = array("111111-Name1-122874|876394|120972", "222222-Name2-122874|876394|120972", "333333-Name3-122874|876394|120972");
$id = "222222";
$rand_number = "999888";
// Loop over each element of the array
// For each element, $i = the key, $arr = the value
foreach ($temp_array as $i => $arr){
// Get the first characters of the element up to the occurrence of a dash "-" ...
$num = substr($arr, 0, strpos($arr, '-'));
// ...and check if it is equal to $id...
if ($num == $id){
// ...if so, add $random_number to the back of the current array element
$temp_array[$i] .= '|' . $rand_number;
}
}
Output:
Array
(
[0] => 111111-Name1-122874|876394|120972
[1] => 222222-Name2-122874|876394|120972|999888
[2] => 333333-Name3-122874|876394|120972
)
See demo
Note: As Dagon pointed out in his comment, your question says appends, but your example shows the data being prepended. This method appends, but can be altered as necessary.
http://php.net/manual/en/control-structures.foreach.php
http://php.net/manual/en/function.substr.php
http://php.net/manual/en/function.strpos.php
You could also using some exploding in this case too:
$temp_array = array("111111-Name1-122874|876394|120972", "222222-Name2-122874|876394|120972", "333333-Name3-122874|876394|120972");
$id = "222222";
$rand_number = "999888";
foreach($temp_array as &$line) {
// ^ reference
$pieces = explode('|', $line); // explode pipes
$first = explode('-', array_shift($pieces)); // get the first part, explode by dash
if($first[0] == $id) { // if first part is equal to id
$first[2] = $rand_number; // replace the third part with random
$first = implode('-', $first); // glue them by dash again
$line = implode('|', array($first, implode('|',$pieces))); // put them and glue them back together again
}
}
echo '<pre>';
print_r($temp_array);
crude answer - its going to depend on the expected values of the initial ids. if they could be longer or shorter then explode on the hyphen instead of using substr
$temp_array = array("111111-Name1-122874|876394|120972","222222-Name2-122874|876394|120972","333333-Name3-122874|876394|120972");
$id = "222222";
$rand_number = "999888";
foreach($temp_array as $t){
if(substr(0,6,$t)==$id){
$new[] = $t.'|'.$rand_number;
}else{
$new[] = $t;
}
}
Another version using array_walk
$temp_array = array("111111-Name1-122874|876394|120972", "222222-Name2-122874|876394|120972", "333333-Name3-122874|876394|120972");
$id = "222222";
$rand_number = "999888";
$params = array('id'=>$id, 'rand_number'=>$rand_number);
array_walk($temp_array, function(&$value, $key, $param){
$parts = explode('-', $value); // Split parts with '-' so the first part is id
if ($parts[0] == $param['id']){
$parts[2]="{$param['rand_number']}|{$parts[2]}"; //prepend rand_number to last part
$value=implode('-',$parts); //combine the parts back
}
},$params);
print_r($temp_array);
If you just want to append The code becomes much shorter
$params = array('id'=>$id, 'rand_number'=>$rand_number);
array_walk($temp_array, function(&$value, $key, $param){
// here check if the first part of the result of explode is ID
// then append the rand_number to the value else append '' to it.
$value .= (explode('-', $value)[0] == $param['id'])? "|{$param['rand_number']}" : '';
},$params);
Edit: Comments added to code.
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.
How can I get the following code to work?
$a = explode('s', $str)[0];
I only see solutions looking like this:
$a = explode('s', $str); $a=$a[0];
As others have said, PHP is unlike JavaScript in that it can't access array elements from function returns.
The second method you listed works. You can also grab the first element of the array with the current(), reset(), or array_pop() functions like so:
$a = current( explode( 's', $str ) ); //or
$a = reset( explode( 's', $str ) ); //or
$a = array_pop ( explode( 's', $str ) );
If you would like to remove the slight overhead that explode may cause due to multiple separations, you can set its limit to 2 by passing two after the other arguments. You may also consider using str_pos and strstr instead:
$a = substr( $str, 0, strpos( $str, 's' ) );
Any of these choices will work.
EDIT Another way would be to use list() (see PHP doc). With it you can grab any element:
list( $first ) = explode( 's', $str ); //First
list( ,$second ) = explode( 's', $str ); //Second
list( ,,$third ) = explode( 's', $str ); //Third
//etc.
That not your style? You can always write a small helper function to grab elements from functions that return arrays:
function array_grab( $arr, $key ) { return( $arr[$key] ); }
$part = array_grab( explode( 's', $str ), 0 ); //Usage: 1st element, etc.
EDIT: PHP 5.4 will support array dereferencing, so you will be able to do:
$first_element = explode(',','A,B,C')[0];
You are correct with your second code-block. explode, and other functions can't return a fully formed array for immediate use,and so you have to set a temporary variable. There may be code in the development tree to do that, but the only way to get the elements you need for now, is the temporary variable.
use current
$a = current(explode('s', $str));
but I found is ugly
You can use this:
$a = array_shift(array_slice(explode("s", $str), 0, 1)));
This is the best way I have found to get a specific element from an array from explode.
Breakdown:
Explode returns an array on delimiter
array_slice($arrayname, $offset, $length) gives you a new array with all items from offset, lenght
array_shift($array) gives you the first (and in this case, the only) item in the array passed to it.
This doesen't look pretty, but does the same as:
$a = explode('s', $str)[0];
There must be a better way to do this, but I have not found it.
Update:
I was investigating this because I wanted to extract a portion of a URL, so i did the following tests:
function urlsplitTest()
{
$url = 'control_panel/deliveryaddress/188/edit/';
$passes = 1000000;
Timer::reset();
Timer::start();
$x =0;
while ($x<$passes) {
$res = array_shift(array_slice(explode("/", $url), 2, 1));
$x++;
}
Timer::stop();
$time = Timer::get();
echo $res.'<br />Time used on: array_shift(array_slice(explode("/", $url), 2, 1)):'.$time;
Timer::reset();
Timer::start();
$x =0;
while ($x<$passes) {
$res = array_get(explode("/", $url), 2);
$x++;
}
Timer::stop();
$time = Timer::get();
echo $res.'<br />Time used on: array_get(explode("/", $url), 2): '.$time;
Timer::reset();
Timer::start();
$x =0;
while ($x<$passes) {
$res = substr($url, 30, -6);
$x++;
}
Timer::stop();
$time = Timer::get();
echo $res.'<br />Time used on: substr($url, 30, -6): '.$time;
}
function array_get($array, $pos) {return $array[$pos];}
The results were as following:
Time used on: array_shift(array_slice(explode("/", $url), 2, 1)):7.897379
Time used on: array_get(explode("/", $url), 2): 2.979483
Time used on: substr($url, 30, -6): 0.932806
In my case i wanted to get the number 188 from the url, and all the rest of the url was static, so i ended up using the substr method, but for a dynamic version where lenth may change, the array_get method above is the fastets and cleanest.