I'd like to explode a multi-line-string like this
color:red
material:metal
to an array like this
$array['color']=red
$array['material']=metal
any idea?
Use explode(), you can use a regexp for it, but it's simple enough without the overhead.
$data = array();
foreach (explode("\n", $dataString) as $cLine) {
list ($cKey, $cValue) = explode(':', $cLine, 2);
$data[$cKey] = $cValue;
}
As mentioned in comments, if data is coming from a Windows/DOS environment it may well have CRLF newlines, adding the following line before the foreach() would resolve that.
$dataString = str_replace("\r", "", $dataString); // remove possible \r characters
The alternative with regexp can be quite pleasant using preg_match_all() and array_combine():
$matches = array();
preg_match_all('/^(.+?):(.+)$/m', $dataString, $matches);
$data = array_combine($matches[1], $matches[2]);
Try this
$value = '1|a,2|b,3|c,4|d';
$temp = explode (',',$value);
foreach ($temp as $pair)
{
list ($k,$v) = explode ('|',$pair);
$pairs[$k] = $v;
}
print_r($pairs);
explode first on line break. Prolly \n
Then explode each of the resulting array's items on : and set a new array to that key/value.
Related
I have an array with rule field that has a string like this:
FREQ=MONTHLY;BYDAY=3FR
FREQ=MONTHLY;BYDAY=3SA
FREQ=WEEKLY;UNTIL=20170728T080000Z;BYDAY=MO,TU,WE,TH,FR
FREQ=MONTHLY;UNTIL=20170527T100000Z;BYDAY=4SA
FREQ=WEEKLY;BYDAY=SA
FREQ=WEEKLY;INTERVAL=2;BYDAY=TH
FREQ=WEEKLY;BYDAY=TH
FREQ=WEEKLY;UNTIL=20170610T085959Z;BYDAY=SA
FREQ=MONTHLY;BYDAY=2TH
Each line is a different array, I am giving a few clues to get an idea of what I need.
What I need is to write a regex that would take off all unnecessary values.
So, I don't need FREQ= ; BYDAY= etc. I basically need the values after = but each one I want to store in a different variable.
Taking third one as an example it would be:
$frequency = WEEKLY
$until = 20170728T080000Z
$day = MO, TU, WE, TH, FR
It doesn't have to be necessarily one regex, there can be one regex for each value. So I have one for FREQ:
preg_match("/[^FREQ=][A-Z]+/", $input_line, $output_array);
But I can't do it for the rest unfortunately, how can I solve this?
The only way to go would be PHP array destructuring:
$str = "FREQ=WEEKLY;UNTIL=20170728T080000Z;BYDAY=MO,TU,WE,TH,FR";
preg_match_all('~(\w+)=([^;]+)~', $str, $matches);
[$freq, $until, $byday] = $matches[2]; // As of PHP 7.1 (otherwise use list() function)
echo $freq, " ", $until, " ", $byday;
// WEEKLY 20170728T080000Z MO,TU,WE,TH,FR
Live demo
Be more general
Using extract function:
preg_match_all('~(\w+)=([^;]+)~', $str, $m);
$m[1] = array_map('strtolower', $m[1]);
$vars = array_combine($m[1], $m[2]);
extract($vars);
echo $freq, " ", $until, " ", $byday;
Live demo
Notice: For this problem, I recommend the generell approach #revo posted, it's concise and safe and easy on the eyes -- but keep in mind, that regular expressions come with a performance penalty compared to fixed string functions, so if you can use strpos/substr/explode/..., try to use them, don't 'knee-jerk' to a preg_-based solution.
Since the seperators are fixed and don't seem to occur in the values your are interested in, and you furthermore rely on knowledge of the keys (FREQ:, etc) you don't need regular-expressions (as much as I like to use them anywhere I can, and you can use them here); why not simply explode and split in this case?
$lines = explode("\n", $text);
foreach($lines as $line) {
$parts = explode(';', $line);
$frequency = $until = $day = $interval = null;
foreach($parts as $part) {
list($key, $value) = explode('=', $part);
switch($key) {
case 'FREQ':
$frequency = $value;
break;
case 'INTERVAL':
$interval = $value;
break;
// and so on
}
}
doSomethingWithTheValues();
}
This may be more readable and efficient if your use-case is as simple as stated.
You need to use the Pattern
;?[A-Z]+=
together with preg_split();
preg_split('/;?[A-Z]+=/', $str);
Explanation
; match Semikolon
? no or one of the last Character
[A-Z]+ match one or more uppercase Letters
= match one =
If you want to have each Line into a seperate Array, you should do it this Way:
# split each Line into an Array-Element
$lines = preg_split('/[\n\r]+/', $str);
# initiate Array for Results
$results = array();
# start Looping trough Lines
foreach($lines as $line){
# split each Line by the Regex mentioned above and
# put the resulting Array into the Results-Array
$results[] = preg_split('/;?[A-Z]+=/', $line);
}
hey there I have this,
$following_user_id .= $row['following_user_id'];
and I get
44443344330
then I use the implode() function and seperate with commans
44,44,33,44,33,0,
but I don't want the last comma on the last number?
Is this possible?
$following_user_ids = array();
//loop this:
$following_user_ids[] = $row['following_user_id'];
$user_ids_string = implode(',',$following_user_ids);
You can split the string into an array of characters, then implode the array.
$array = preg_split('//', $following_user_id, -1, PREG_SPLIT_NO_EMPTY);
echo implode( ',', $array );
Collect your data into an array of strings and use the implode function:
$uids = array();
while($row = mysql_fetch_assoc($result)){
array_push($uids, $row['following_user_id']);
}
$following_user_id = implode(',', $uids);
Check implode: http://php.net/manual/en/function.implode.php
Code example: I'm assuming your using some sort of loop?
$arrUsers = new array();
... your loop code here ...
array_push($arrUsers, $row['following_user_id']);
... end loop code ..
$following_user_id = impload(",", $arrUsers);
Implode should not be inserting a comma at the end of that string there. Are you sure there isn't an empty string at the end of your array sequence?
Either way, to fix the string you have, just get rid of the last character of the string:
$concatUserIds = "44,44,33,44,33,0,";
$concatUserIds = substr($concatUserIds, 0, strlen($concatUserIds) - 1);
Further, if you're not going to be using the non-comma delimited number set, why don't you just add a comma every time you add a user id. That way you don't even have to use the implode function.
This works for me:
<?php
$following_user_id.= $row['following_user_id'];
$following_user_id=preg_replace('/(?<=\d)(?=(\d)+(?!\d))/',',',$following_user_id);
echo $following_user_id."<br>";
?>
Try using arrays, example
<?php
$arr = array();
$arr[] = 'foo';
$arr[] = 'bar';
echo implode(',', $arr);
I have a string like this:
key=value, key2=value2
and I would like to parse it into something like this:
array(
"key" => "value",
"key2" => "value2"
)
I could do something like
$parts = explode(",", $string)
$parts = array_map("trim", $parts);
foreach($parts as $currentPart)
{
list($key, $value) = explode("=", $currentPart);
$keyValues[$key] = $value;
}
But this seems ridiciulous. There must be some way to do this smarter with PHP right?
If you don't mind using regex ...
$str = "key=value, key2=value2";
preg_match_all("/([^,= ]+)=([^,= ]+)/", $str, $r);
$result = array_combine($r[1], $r[2]);
var_dump($result);
<?php parse_str(str_replace(", ", "&", "key=value, key2=value2"), $array); ?>
if you change your string to use & instead of , as the delimiter, you can use parse_str()
If you can change the format of the string to conform to a URL query string (using & instead of ,, among other things, you can use parse_str. Be sure to use the two parameter option.
Here's a single command solution using array_reduce formatted in multple lines for readability:
<?php
$str = "key=value, key2=value2";
$result = array_reduce(
explode(',', $str),
function ($carry, $kvp) {
list($key, $value)=explode('=', $kvp);
$carry[trim($key)]=trim($value);
return $carry;
}, []);
I have a string which contains quite a bit of data. I want to split the data into a 2D array. The data in the string is split by a ~ (tilde) for the columns and a : (colon) for the different rows.
An example string could be: "London~10~20~cold:New York~23~53~hot:Madrid~43~12~dry".
Thanks.
$string = "London~10~20~cold:New York~23~53~hot:Madrid~43~12~dry";
$array = explode(':', $string);
foreach($array as &$value) $value = explode('~', $value);
Functional way (PHP 5.3.x needed):
$string = "London~10~20~cold:New York~23~53~hot:Madrid~43~12~dry";
$map = array_map(function($el) {
return explode('~', $el);
}, explode(':', $string));
Another alternative would be:
preg_match_all('/(.*?)~(.*?)~(.*?)~(.*?)(?:$|:)/', $string, $array,
PREG_SET_ORDER);
It's more cumbersome in that you have to predefine the column format. It also returns the complete match in each rows [0]. Otherwise (due to PREG_SET_ORDER) it's in your desired 2d format.
Just posting it here to please and annoy the microoptimizers at the same time. Despite the common Stackoverflow meme, the regex is three times faster than the explode loop.
You can split data in php with explode().
So first you have to split the string, than you have to split your entries again with explode().
$data = explode(':', $string);
$array = array();
foreach($data as $d) {
$d = explode('~', $d);
$array[] = $d; //e.g. $array[0][0] --> London
//$array[$d[0]] = array('temperature' => $d[1], 'dont-know' => $d[2], 'climate' => $d[3]); //e.g. $arra['London'] => array(...)
}
A "functional" style
$array = array_map(function($value) {
return explode('~', $value);
}, explode(':',$string););
$data = "google,bing,searchengine,seo,search";
$exp = explode(",",$data);
$filtr = array("google","bing");
$fdat = str_replace($filtr,"",$data);
$clean = implode(",",$fdat);
echo $clean;
this gives out put ,,searchengine,seo,search
How can I get rid of first two blank commas?
Better get the difference of your splitted arrays $exp minus $filtr:
$clean = implode(',', array_diff($exp, $filtr));
This will also avoid the chance that you will only remove a substring of another word like when removing car from bike,car,carpet should result in bike,carpet and not in bike,pet.
And if you want to allow whitespace before and after each word, consider using trim and preg_split:
$exp = preg_split('/\s*,\s*/', trim($data));
trim will remove any preceding and trailing whitespace and the pattern for preg_split allows whitespace surrounding the comma too.
I'm getting an error when trying this code you did. You can use the following to remove google & bing (that are in an array) from a comma separated string:
$data = "google,bing,searchengine,seo,search";
$exp = explode(",",$data);
$filtr = array("google","bing");
$diff = array_diff($exp, $filtr);
$clean = implode(",",$diff);
echo $clean;
Your piece of code could also look like this:
$data = "google,bing,searchengine,seo,search";
$exp = explode(",",$data);
$filtr = array("google","bing");
foreach ($exp as $key => $item) {
if (in_array($key, $filtr)) unset($exp[$key]);
}
$clean = implode(",",$exp);
echo $clean;
Its useful when there is few items in $data. For big arrays it would need optimizing.
You would be better if checking the value within a loop like so:
$data = "google,bing,searchengine,seo,search";
$exp = explode(",",$data);
$filtr = array("google","bing");
foreach($exp as $k => $v)
{
if(in_array($v,$filtr))
{
unset($ext[$k]);
}
}
$clean = implode(",",$ext);
echo $clean;