PHP substr by string, not by length - php
I am using this code
substr(trim($val), 0, 2).'/'.substr(trim($val), 0, 4).'/'.trim($val);
to convert
a.b.c.
to
a. / a.b. / a.b.c.
This obviously does not work as soon as I get double digits like a.bb.c., which results in
a. / a.bb / a.bb.c.
(dot is missing!) instead of
a. / a.bb. / a.bb.c.
Is there a way to extract/trim parts not based on length, but on the dots?
using explode and a foreach you can make it recursive, like this:
$val = 'aa.bv.cc.dd';
$vals = explode('.',$val);
$result = [];
foreach($vals as $k => $v) {
if(trim($v) === '') continue;
$result[] = ($k > 0 ? $result[$k-1] : '').$v.'.';
}
echo implode(' / ',$result);
in this way you don't need to worry about the amount of letter after each dot and about the amount of segments, and you can handle something like "a.b" or "a.b.c" or "aaa.bbb.ccc.ddd.eeeee" letting the script do all the job for you ;)
<?php
$data='a.b.c.';
$data=explode('.',$data);
$newData=array(
$data[0].'. ',$data[0].'.'.$data[1].'. ',$data[0].'.'.$data[1].'.'.$data[2].'.'
);
$newData = implode("/", $newData);
echo $newData;
And the output is :
a. /a.b. /a.b.c.
Related
Replacing ',' characters in only odd positions
I need replace ',' characters with regex in php, but only in odd positions
I have:
{"phone","11975365654","name","John Doe","cpf","42076792864"}
I want replace ',' to ':', but only the odd:
{"phone":"11975365654","name":"John Doe","cpf":"42076792864"}
I'm trying this regex:
preg_replace('/,/', ':', $data)
But it get all quotes and no only the odd.
Can you help me?
Make it simple:
preg_replace('/(("[a-z]+"),(".+?"))+/', '$2:$3', $a)
Rather than regex, this just converts the list to an array (using str_getcsv() to cope with the quotes). Then loops every other item in the list, using that item as the key and the next item as the value. This can then be json_encoded() to give the result...
$data = str_getcsv(trim($input, "{}"));
$output = [];
for ( $i=0, $k=count($data); $i < $k; $i+=2) {
$output[$data[$i]] = $data[$i+1];
}
echo json_encode($output);
It is not ideal to use regex for this task. Having said that, if you know that your input can be matched by a simple regex, this should do it :
$str = '{"phone","11975365654","name","John Doe","cpf","42076792864"}';
$result = preg_replace('/,(.*?(?:,|[^,]*$))/ms', ':\\1', $str);
This lenient to some extra characters but it will fail if any string contains commas
Example
Here's an example of using standard PHP functions:
$input = '{"phone","11975365654","name","John Doe","cpf","42076792864"}';
$dataIn = str_getcsv(trim($input, '{}'));
$keys = array_filter($dataIn, function ($key) { return !($key & 1); }, ARRAY_FILTER_USE_KEY);
$values = array_filter($dataIn, function ($key) { return $key & 1; }, ARRAY_FILTER_USE_KEY);
$DataOut = array_combine($keys, $values);
$output = json_encode($DataOut);
echo $output;
This code is a lot longer than using a regex, but it is probably easier to read and maintain in the long run. It can cope with commas in the values.
Another option could be using array_splice and loop while there are still elements in the array:
$str = '{"phone","11975365654","name","John Doe","cpf","42076792864"}';
$data = str_getcsv(trim($str, '{}'));
$result = array();
while(count($data)) {
list($k, $v) = array_splice($data, 0, 2);
$result[$k] = $v;
}
echo json_encode($result);
Output
{"phone":"11975365654","name":"John Doe","cpf":"42076792864"}
PHP strpos() function comparision of string conflicts in numbers
I am using strpos() function to find the string in an array key members.
foreach($_POST as $k => $v){
// for all types of questions of chapter 1 only
$count = 0;
if(strpos($k, 'chap1') !== false){
$count++;
}
}
I know that it works only until the keys are (chap1e1, chap1m1, chap1h1) but when it comes to (chap10e1, chap10m1, chap10h1), my logic won't be working on those.
Isn't there any way, so that, I can distinguish the comparison between (chap1 & chap10)?
Or, Is there any alternative way of doing this? Please give me some ideas on it. Thank you!
Basically, preg_match would do just that:
$count = 0;
foreach($_POST as $k => $v)
{
if (preg_match('/\bchap1[^\d]{0,1}/', $k)) ++$count;
}
How the pattern works:
\b: a word-boundary. matches chap1, but not schap, it can't be part of a bigger string
chap1: matches a literal string (because it's preceded by \b, this literal can't be preceded by a char, but it can be the beginning of a string, for example
[^\d]{0,1}: Matches anything except numbers zero or one times. so chap10 is not a match, but chap1e is
To deal with all of these "chapters" at once, try this:
$count = array();
foreach($_POST as $k => $v)
{
if (preg_match('/\bchap(\d+)(.*)/', $k, $match))
{
$match[2] = $match[2] ? $match[2] : 'empty';//default value
if (!isset($count[$match[1]])) $count[$match[1]] = array();
$count[$match[1]][] = $match[2];
}
}
Now this pattern is a bit more complex, but not much
\bchap: same as before, wourd boundary + literal
(\d+): Match AND GROUP all numbers (one or more, no numbers aren't accepted). We use this group as key later on ($match[1])
(.*): match and group the rest of the string. If there's nothing there, that's OK. If you don't want to match keys like chap1, and require something after the digits, replace the * asterisk with a plus sign
Now, I've turned the $count variable into an array, that will look like this:
array('1' => array('e1', 'a3'),
'10'=> array('s3')
);
When $_POST looks something like this:
array(
chap1e1 => ?,
chap1a3 => ?,
chap10s3=> ?
)
What you do with the values is up to you. One thing you could do is to group the key-value pairs per "chapter"
$count = array();
foreach($_POST as $k => $v)
{
if (preg_match('/\bchap(\d+)/', $k, $match))
{
if (!isset($count[$match[1]])) $count[$match[1]] = array();
$count[$match[1]][$k] = $v;//$match[1] == chap -> array with full post key->value pairs
}
}
Note that, if this is a viable solution for you, it's not a bad idea to simplify the expression (because regex's are best kept simple), and just omit the (.*) at the end.
With the code above, to get the count of any "chap\d" param, simply use:
echo 'count 1: ', isset($count[1]) ? count($count[1]) : 0, PHP_EOL;
you may need tweaking the reg ex code,anyway this will give a start
if (preg_match("/chap[0-9]{1,3}/i", $v, $match)) {
$count++;
}
You can use: $rest = substr($k, 0, 5); and then compare your string like ($rest !== 'chap1') I hope this works.
I have tested the below code on Execute PHP Online
<?php
$_POST['chap1e1'] = 'test1';
$_POST['chap10e1'] = 'test2';
foreach($_POST as $k => $v){
// for all types of questions of chapter 1 only
$count = 0;
var_dump($k);
var_dump(strpos($k, 'chap1'));
var_dump(strpos($k, 'chap1') !== false);
}
foreach($_POST as $k => $v){
// for all types of questions of chapter 1 only
//$count = 0;
var_dump($count);
if(strpos($k, 'chap1') !== false){
$count++;
}
}
echo $count;
?>
And the get the below output
string(7) "chap1e1" int(0) bool(true) string(8) "chap10e1" int(0) bool(true) int(0) int(1) 2
Indicating the strpos is able to locate "chap1" in "chap10e1"
but the $count total is wrong because your code always reset $count to 0 inside the foreach loop
Extracting meaningful data from this complicated string in PHP
I'm receiving some structured data for my PHP application, but the format is somewhat unpredictable and difficult to deal with. I don't get a say in the initial format of the data. What I get is a string (sample given below). [9484,'Víctor Valdés',8,[[['accurate_pass',[15]],['touches',[42]],['saves',[4]],['total_pass',[24]],['good_high_claim',[2]],['formation_place',[1]]]],1,'GK',1,0,0,'GK',31,183,78],[1320,'Carles Puyol',7.76,[[['accurate_pass',[50]],['touches',[75]],['aerial_won',[3]],['total_pass',[55]],['total_tackle',[1]],['formation_place',[6]]]],2,'DC',5,0,0,'D(CLR)',35,178,80],[5780,'Dani Alves',8.21,[[['accurate_pass',[58]],['touches',[99]],['total_scoring_att',[1]],['total_pass',[66]],['total_tackle',[6]],['aerial_lost',[1]],['fouls',[4]],['formation_place',[2]]]],2,'DR',22,0,0,'D(CR)',30,173,64],[83686,'Marc Bartra',8.31,[[['accurate_pass',[64]],['touches',[88]],['won_contest',[1]],['total_scoring_att',[1]],['aerial_won',[1]],['total_pass',[66]],['total_tackle',[5]],['aerial_lost',[1]],['fouls',[1]],['formation_place',[5]]]],2,'DC',15,0,0,'D(C)',22,181,70],[13471,'Adriano',6.72,[[['accurate_pass',[16]],['touches',[28]],['aerial_won',[2]],['total_pass',[18]],['total_tackle',[1]],['formation_place',[3]]]],2,'DL',21,1,31,'D(CLR),M(LR)',29,172,67] The above is data for 5 football players. This is what I need to get: [9484,'Víctor Valdés',8,[[['accurate_pass',[15]],['touches',[42]],['saves',[4]],['total_pass',[24]],['good_high_claim',[2]],['formation_place',[1]]]],1,'GK',1,0,0,'GK',31,183,78] [1320,'Carles Puyol',7.76,[[['accurate_pass',[50]],['touches',[75]],['aerial_won',[3]],['total_pass',[55]],['total_tackle',[1]],['formation_place',[6]]]],2,'DC',5,0,0,'D(CLR)',35,178,80] [5780,'Dani Alves',8.21,[[['accurate_pass',[58]],['touches',[99]],['total_scoring_att',[1]],['total_pass',[66]],['total_tackle',[6]],['aerial_lost',[1]],['fouls',[4]],['formation_place',[2]]]],2,'DR',22,0,0,'D(CR)',30,173,64] [83686,'Marc Bartra',8.31,[[['accurate_pass',[64]],['touches',[88]],['won_contest',[1]],['total_scoring_att',[1]],['aerial_won',[1]],['total_pass',[66]],['total_tackle',[5]],['aerial_lost',[1]],['fouls',[1]],['formation_place',[5]]]],2,'DC',15,0,0,'D(C)',22,181,70] [13471,'Adriano',6.72,[[['accurate_pass',[16]],['touches',[28]],['aerial_won',[2]],['total_pass',[18]],['total_tackle',[1]],['formation_place',[3]]]],2,'DL',21,1,31,'D(CLR),M(LR)',29,172,67] Now, what I've done manually in the above example I need to do reliably with PHP. As you see, each player has a set of data. In order to split the big string into individual players, I can't just explode it by "],[" because that substring appears within each player's data too an unpredictable number of times. Each player has a certain number of statistics (accurate_pass, touches etc) but they don't all have the same statistics. For instance, player #1 has "saves" and the others don't. Player #4 has "won_contest" and the others don't. There is no way to know who will have which stats. That means I can't just count commas until the new player or something similar. Each player has a number before his name, but that number has an unpredictable number of digits and there's no way to discern it from other numbers which may appear in the string. What I see as a constant occurrence for all players is the last bit: before the last closed bracket there are always 3 integers divided by commas. This type of substring (INT,INT,INT]) doesn't seem to appear in any other situation. Maybe this could be of some use?
A "hard" way to do this is parenthesis counting (less common in PHP, more common in text parsing languages)...
<?php
$str = "[9484,'Víctor Valdés',8,[[['accurate_pass',[15]],['touches',[42]],['saves',[4]],['total_pass',[24]],['good_high_claim',[2]],['formation_place',[1]]]],1,'GK',1,0,0,'GK',31,183,78],[1320,'Carles Puyol',7.76,[[['accurate_pass',[50]],['touches',[75]],['aerial_won',[3]],['total_pass',[55]],['total_tackle',[1]],['formation_place',[6]]]],2,'DC',5,0,0,'D(CLR)',35,178,80],[5780,'Dani Alves',8.21,[[['accurate_pass',[58]],['touches',[99]],['total_scoring_att',[1]],['total_pass',[66]],['total_tackle',[6]],['aerial_lost',[1]],['fouls',[4]],['formation_place',[2]]]],2,'DR',22,0,0,'D(CR)',30,173,64],[83686,'Marc Bartra',8.31,[[['accurate_pass',[64]],['touches',[88]],['won_contest',[1]],['total_scoring_att',[1]],['aerial_won',[1]],['total_pass',[66]],['total_tackle',[5]],['aerial_lost',[1]],['fouls',[1]],['formation_place',[5]]]],2,'DC',15,0,0,'D(C)',22,181,70],[13471,'Adriano',6.72,[[['accurate_pass',[16]],['touches',[28]],['aerial_won',[2]],['total_pass',[18]],['total_tackle',[1]],['formation_place',[3]]]],2,'DL',21,1,31,'D(CLR),M(LR)',29,172,67]";
$line = ',';
$paren_count = 0;
$lines = array();
for($i=0; $i<strlen($str); $i++)
{
$line.= $str{$i};
if($str{$i} == '[') $paren_count++;
elseif($str{$i} == ']')
{
$paren_count--;
if($paren_count == 0)
{
$lines[] = substr($line,1);
$line = '';
}
}
}
print_r($lines);
?>
Looks like #Boundless answer is correct, you can use json_decode, but you need to do a couple of things to the string you get first, which also seems like a valid json formatted string.
This worked for me:
<?php
$str = "[9484,'Víctor Valdés',8,[[['accurate_pass',[15]],['touches',[42]],['saves',[4]],['total_pass',[24]],['good_high_claim',[2]],['formation_place',[1]]]],1,'GK',1,0,0,'GK',31,183,78],[1320,'Carles Puyol',7.76,[[['accurate_pass',[50]],['touches',[75]],['aerial_won',[3]],['total_pass',[55]],['total_tackle',[1]],['formation_place',[6]]]],2,'DC',5,0,0,'D(CLR)',35,178,80],[5780,'Dani Alves',8.21,[[['accurate_pass',[58]],['touches',[99]],['total_scoring_att',[1]],['total_pass',[66]],['total_tackle',[6]],['aerial_lost',[1]],['fouls',[4]],['formation_place',[2]]]],2,'DR',22,0,0,'D(CR)',30,173,64],[83686,'Marc Bartra',8.31,[[['accurate_pass',[64]],['touches',[88]],['won_contest',[1]],['total_scoring_att',[1]],['aerial_won',[1]],['total_pass',[66]],['total_tackle',[5]],['aerial_lost',[1]],['fouls',[1]],['formation_place',[5]]]],2,'DC',15,0,0,'D(C)',22,181,70],[13471,'Adriano',6.72,[[['accurate_pass',[16]],['touches',[28]],['aerial_won',[2]],['total_pass',[18]],['total_tackle',[1]],['formation_place',[3]]]],2,'DL',21,1,31,'D(CLR),M(LR)',29,172,67]";
$str = '[' . $str . ']';
$str = str_replace('\'','"', $str);
//convert string to array
$arr = json_decode($str);
//now it's a php array so you can access any value
//echo '<pre>';
//print_r( $arr );
//echo '</pre>';
echo $arr [0][1]; //prints "Victor Valdes"
?>
Your string looks like JSON but it is not valid JSON so json_decode() will not work.
Your specific case could be converted to valid JSON by wrapping the string in a pair of [] and replacing the single quotes with double quotes:
$string = str_replace("'", '"', $your_string);
var_dump(json_decode('[' . $string . ']'));
See this example.
Of course the best solution would be to make sure that valid JSON is supplied because this will break easily if your text strings contain for example double quotes.
Try parsing as json, then pulling out what you want. Assuming that the data comes in blocks of 4 you can try:
$arr = json_decode($str);
for($i = 0; $i < count($arr) - 3; $i += 4)
{
$arr[] = new array($arr[$i], $arr[$i + 1], $arr[$i + 2], $arr[$i + 3]);
}
Why not count the [ in a loop? Here's a quick untested loop that could get you started.
$output = array('');
$brackets = 0;
$index = 0;
foreach (str_split($input) as $ch) {
if ($ch == '[') {
$brackets++;
}
$output[$index] .= $ch;
if ($ch == ']') {
$brackets--;
if ($brackets === 0) {
$index++;
$output[$index] = '';
}
}
}
Not very elegant though...
PHP From string to two variables
In my db there is a table that have some values like this[string]
100/100
50/100
40/80
7/70
I need to change this values in
100%
50%
50%
10%
How can i do this using only PHP/mysql code?
EDIT:this is the code:
foreach ($html->find('div.stat') as $status_raw){
$status = $tag_pic_raw->src;
$status = mysql_real_escape_string($status);
$data->query("INSERT IGNORE INTO `tb` (`value`) VALUES ('".$status."')");
}
I have used a DOM inspector to get info from another site
Used explode() combined with some math.
$str = '40/80';
$vals = explode('/', $str);
$percent = (($vals[0] / $vals[1]) * 100).'%';
echo $percent;
use explode() to divide up the values and then math them.
foreach($array as $val) // assuming all the (##/##) values are in an array
{
$mathProblem = explode("/", $val);
echo (intval($mathProblem[0]) / intval($mathProblem[1]) * 100)."%<br />";
}
You can set up a function similar to this:
function math($one)
{
$new = explode("/", $one);
$math = $new[0] / $new[1];
$answer = $math * 100;
return $answer."%";
}
Then every time you need to query something, you can do it simply by doing this:
foreach ($results as $r)
{
echo math($r);
}
This just makes it (I think) tidier and easier to read.
Use explode() :Returns an array of strings, each of which is a substring of string formed by splitting it on boundaries formed by the string delimiter( / in this case).
$arr=array('80/100','50/100','40/80');
foreach($arr as $str){
$values = explode('/',$str);
echo ((int)$values[0]/(int)$values[1])*100.'%<br/>';
}
"Unfolding" a String
I have a set of strings, each string has a variable number of segments separated by pipes (|), e.g.:
$string = 'abc|b|ac';
Each segment with more than one char should be expanded into all the possible one char combinations, for 3 segments the following "algorithm" works wonderfully:
$result = array();
$string = explode('|', 'abc|b|ac');
foreach (str_split($string[0]) as $i)
{
foreach (str_split($string[1]) as $j)
{
foreach (str_split($string[2]) as $k)
{
$result[] = implode('|', array($i, $j, $k)); // more...
}
}
}
print_r($result);
Output:
$result = array('a|b|a', 'a|b|c', 'b|b|a', 'b|b|c', 'c|b|a', 'c|b|c');
Obviously, for more than 3 segments the code starts to get extremely messy, since I need to add (and check) more and more inner loops. I tried coming up with a dynamic solution but I can't figure out how to generate the correct combination for all the segments (individually and as a whole). I also looked at some combinatorics source code but I'm unable to combine the different combinations of my segments.
I appreciate if anyone can point me in the right direction.
Recursion to the rescue (you might need to tweak a bit to cover edge cases, but it works):
function explodinator($str) {
$segments = explode('|', $str);
$pieces = array_map('str_split', $segments);
return e_helper($pieces);
}
function e_helper($pieces) {
if (count($pieces) == 1)
return $pieces[0];
$first = array_shift($pieces);
$subs = e_helper($pieces);
foreach($first as $char) {
foreach ($subs as $sub) {
$result[] = $char . '|' . $sub;
}
}
return $result;
}
print_r(explodinator('abc|b|ac'));
Outputs:
Array
(
[0] => a|b|a
[1] => a|b|c
[2] => b|b|a
[3] => b|b|c
[4] => c|b|a
[5] => c|b|c
)
As seen on ideone.
This looks like a job for recursive programming! :P
I first looked at this and thought it was going to be a on-liner (and probably is in perl).
There are other non-recursive ways (enumerate all combinations of indexes into segments then loop through, for example) but I think this is more interesting, and probably 'better'.
$str = explode('|', 'abc|b|ac');
$strlen = count( $str );
$results = array();
function splitAndForeach( $bchar , $oldindex, $tempthread) {
global $strlen, $str, $results;
$temp = $tempthread;
$newindex = $oldindex + 1;
if ( $bchar != '') { array_push($temp, $bchar ); }
if ( $newindex <= $strlen ){
print "starting foreach loop on string '".$str[$newindex-1]."' \n";
foreach(str_split( $str[$newindex - 1] ) as $c) {
print "Going into next depth ($newindex) of recursion on char $c \n";
splitAndForeach( $c , $newindex, $temp);
}
} else {
$found = implode('|', $temp);
print "Array length (max recursion depth) reached, result: $found \n";
array_push( $results, $found );
$temp = $tempthread;
$index = 0;
print "***************** Reset index to 0 *****************\n\n";
}
}
splitAndForeach('', 0, array() );
print "your results: \n";
print_r($results);
You could have two arrays: the alternatives and a current counter.
$alternatives = array(array('a', 'b', 'c'), array('b'), array('a', 'c'));
$counter = array(0, 0, 0);
Then, in a loop, you increment the "last digit" of the counter, and if that is equal to the number of alternatives for that position, you reset that "digit" to zero and increment the "digit" left to it. This works just like counting with decimal numbers.
The string for each step is built by concatenating the $alternatives[$i][$counter[$i]] for each digit.
You are finished when the "first digit" becomes as large as the number of alternatives for that digit.
Example: for the above variables, the counter would get the following values in the steps:
0,0,0
0,0,1
1,0,0 (overflow in the last two digit)
1,0,1
2,0,0 (overflow in the last two digits)
2,0,1
3,0,0 (finished, since the first "digit" has only 3 alternatives)