How to convert this
$myvar = '[aaa](11,22,33,44,55)[bbb](1,2,3,4,5)';
into that
$arr_name[1] = 'aaa';
$arr_val[1] = '11,22,33,44,55';
$arr_name[2] = 'bbb';
$arr_val[2] = '1,2,3,4,5';
What functions should I use for it ?
if(preg_match_all('/\[(.*?)\]\((.*?)\)/',$myvar,$matches)) {
foreach($matches[0] as $k=>$v) {
$arr_name[$k] = $matches[1][$k];
$arr_val[$k] = $matches[2][$k];
}
}
You could try using regular expressions to extract your keys & variables, then insert them into an array:
$keys = array();
preg_match_all("/\[.+\]/", $myvar, $keys);
$values = array();
preg_match_all("/\(.+\)/", $myvar, $values);
$numKeys = count($keys);
$numVals = count($values);
$result = array();
foreach ($i = 0; $i < $numKeys; $i++) {
if ($i < $numVals) {
$result[trim($keys[$i], "[]")] = trim($values[$i], "()");
}
}
Related
I have an image gallery and each is saved by index.. gallery1: /image here.. gallery2: / image here.. etc..
I'm using an index with multiple for loops to return the images and by column because it's either Masonry or rectangular. I am getting the return fine except for the very last index.
private function rectangle($items, $columns, $contents = array()) {
$thumbs = array('talent_thumbnail','360x207');
$arr = array();
$col = round(count($items) / $columns);
$perCol = floor(count($items) / $columns);
$extra = count($items) % $columns;
$ind = 1;
$length = count($items);
$arr = array();
for($i = 0; $i < $columns && $ind < $length; $i++) {
$temp = array();
for($j = 0; $j < $perCol; $j++) {
$obj = new JObject();
$obj->image = $items['gallery' . $ind]['photo'];
$obj->alt_text = $items['gallery'. $ind]['alt_text'];
$temp[] = $obj;
$ind++;
}
if ($extra > 0) {
$obj = new JObject();
$obj->image = $items['gallery'. $ind]['photo'];
$obj->alt_text = $items['gallery'. $ind]['alt_text'];
$temp[] = $obj;
$ind++;
$extra--;
}
$arr[] = $temp;
}
}
I know it can't be that hard but I'm not that good at it right yet.
Any help is so much welcome.
Thank You.
You set the variable $ind to 1, count the length of the array, and then initialize the for loop with the condition $ind < $length.
When $ind reaches the index needed to access the last item, the loop is not run again, since $ind is now equal to $length, not smaller.
You can fix this by changing the condition in your for-loop to "less or equal":
$i < $columns && $ind <= $length
This runs the loop once more when $ind has reached the last index.
Probably the problem is at this line:
$ind = 1;
In PHP non-associative arrays have the indexes starting to 0 instead of 1:
$arr = array('a', 'b', 'c');
print_r($arr);
// output:
Array ( [0] => a [1] => b [2] => c )
So, try to change that line in your code to:
$ind = 0;
Complete code:
private function rectangle($items, $columns, $contents = array()) {
$thumbs = array('talent_thumbnail','360x207');
$arr = array();
$col = round(count($items) / $columns);
$perCol = floor(count($items) / $columns);
$extra = count($items) % $columns;
$ind = 0;
$length = count($items);
$arr = array();
for($i = 0; $i < $columns && $ind < $length; $i++) {
$temp = array();
for($j = 0; $j < $perCol; $j++) {
$obj = new JObject();
$obj->image = $items['gallery' . $ind]['photo'];
$obj->alt_text = $items['gallery'. $ind]['alt_text'];
$temp[] = $obj;
$ind++;
}
if ($extra > 0) {
$obj = new JObject();
$obj->image = $items['gallery'. $ind]['photo'];
$obj->alt_text = $items['gallery'. $ind]['alt_text'];
$temp[] = $obj;
$ind++;
$extra--;
}
$arr[] = $temp;
}
}
I have a string composed by many letters, at some point, one letter from a group can be used and this is represented by letters enclosed in []. I need to expand these letters into its actual strings.
From this:
$str = 'ABCCDF[GH]IJJ[KLM]'
To this:
$sub[0] = 'ABCCDFGIJJK';
$sub[1] = 'ABCCDFHIJJK';
$sub[2] = 'ABCCDFGIJJL';
$sub[3] = 'ABCCDFHIJJL';
$sub[4] = 'ABCCDFGIJJM';
$sub[5] = 'ABCCDFHIJJM';
UPDATE:
Thanks to #Barmar for the very valuable suggestions.
My final solution is:
$str = '[GH]DF[IK]TF[ADF]';
function parseString(string $str) : array
{
$i = 0;
$is_group = false;
$sub = array();
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
foreach ($chars as $key => $value)
{
if(ctype_alpha($value))
{
if($is_group){
$sub[$i][] = $value;
} else {
if(!isset($sub[$i][0])){
$sub[$i][0] = $value;
} else {
$sub[$i][0] .= $value;
}
}
} else {
$is_group = !$is_group;
++$i;
}
}
return $sub;
}
The recommended function for combinations is (check the related post):
function array_cartesian_product($arrays)
{
$result = array();
$arrays = array_values($arrays);
$sizeIn = sizeof($arrays);
$size = $sizeIn > 0 ? 1 : 0;
foreach ($arrays as $array)
$size = $size * sizeof($array);
for ($i = 0; $i < $size; $i++) {
$result[$i] = array();
for ($j = 0; $j < $sizeIn; $j++)
array_push($result[$i], current($arrays[$j]));
for ($j = ($sizeIn - 1); $j >= 0; $j--) {
if (next($arrays[$j]))
break;
elseif (isset($arrays[$j]))
reset($arrays[$j]);
}
}
return $result;
}
Check the solution with:
$combinations = array_cartesian_product(parseString($str));
$sub = array_map('implode', $combinations);
var_dump($sub);
Convert your string into a 2-dimensional array. The parts outside brackets become single-element arrays, while each bracketed trings becomes an array of single characters. So your string would become:
$array =
array(array('ABCCDF'),
array('G', 'H', 'I'),
array('IJJ'),
array('K', 'L', 'M'));
Then you just need to compute all the combinations of those arrays; use one of the answers at How to generate in PHP all combinations of items in multiple arrays. Finally, you concatenate each of the resulting arrays with implode to get an array of strings.
$combinations = combinations($array);
$sub = array_map('implode', $combinations);
How do I make sure that the password contains at least one character from each array? I could use do..while, right? What I don't quite understand is what I will need to put in the if statement inside do...while.
Is do...while the only way to ensure at least one character from each array is in the final password or are there other ways?
$length = 6;
$a1 = str_split('0123456789');
$a2 = str_split('%^*+~?!');
$a3 = str_split('abcdefghigklmnopqrstuvwxyz');
$result = ""; //final random password
for($i = 0; $i < $length; $i++){
$values = [$a1,$a2,$a3];
$chosen = array_rand($values);
$result .= $values[$chosen][array_rand($values[$chosen])];
}
echo $result;
$length = 6;
$a1 = str_split('0123456789');
$a2 = str_split('%^*+~?!');
$a3 = str_split('abcdefghigklmnopqrstuvwxyz');
$resultArr[] = $a1[array_rand($a1)];
$resultArr[] = $a2[array_rand($a2)];
$resultArr[] = $a3[array_rand($a3)];
for($i = 0; $i < $length-3; $i++){
$values = [$a1,$a2,$a3];
$chosen = array_rand($values);
$resultArr[] = $values[$chosen][array_rand($values[$chosen])];
}
shuffle($resultArr);
$result = implode($resultArr); //final random password
echo $result;
You can surround the for wit ha do..while and in the condition check with preg_match() and a regex pattern that checks if at least one character is in the result:
<?php
$length = 6;
$a1 = str_split('0123456789');
$a2 = str_split('%^*+~?!');
$a3 = str_split('abcdefghigklmnopqrstuvwxyz');
$result = ""; //final random password
do {
for($i = 0; $i < $length; $i++){
$values = [$a1,$a2,$a3];
$chosen = array_rand($values);
$result .= $values[$chosen][array_rand($values[$chosen])];
}
} while(!(preg_match('/^(?=.*?[0-9])(?=.*?[a-z])(?=.*?[%*+?!]).{1,}/', $result)));
echo $result;
If the there's no coincidences with the pattern using preg_match, then will return false, in the do..while condition we check if one preg_match is false, if it is, do it again.
I made my answer general for any number of arrays.
I would use preg_match() for this, but for the question you asked, yes, you need to check each array separately:
$user_inputted_password = $_POST['user_inputted_password'];
$length = strlen($user_inputted_password); // user input password - you are capturing this somewhere, right
$a1 = str_split('0123456789');
$a2 = str_split('%^*+~?!');
$a3 = str_split('abcdefghigklmnopqrstuvwxyz');
$validate = array();
$result = ""; //final random password
function populate_validation_array($match_num, &$validate) {
if (!in_array($match_num, $validate)) {
$validate[] = $match_num;
}
}
$numeric_indexes = array(1, 2, 3);
$index_count = count($numeric_indexes);
for($i = 0; $i < $length; $i++){
for($j = 0; $j < $index_count; $j++) {
$numeric_index = $numeric_indexes[$j];
if (in_array($user_inputted_password[$i], ${"a" . $numeric_index})) {
populate_validation_array($numeric_index, $validate);
}
}
}
if (count($validate) === $index_count) {
$values = array();
for($i = 0; $i < $index_count; $i++) {
$values[] = ${"a" . ($i + 1)};
}
$chosen = array_rand($values);
$result .= $values[$chosen][array_rand($values[$chosen])];
}
echo $result;
Here, there is a example string "XjYAKpR" .. how to create all new string possibility with that string ??
I've tried before
function containAllRots($s, $arr) {
$n = strlen($s);
$a = array();
for ($i = 0; $i < $n ; $i++) {
$rotated = rotate(str_split($s), $i);
$a[] = $rotated;
}
print_r($a);die();
if (array_diff($arr, $a)) {
return True;
}
else
{
return False;
}
}
I make 2 function rotate and generate
function rotate($l, $n) {
$b = $l[$n];
$sisa = array_values(array_diff($l, array($b)));
for ($i = 0; $i < count($sisa) ; $i++) {
$random[] = generate($sisa, $b);
}
print_r($random);die();
$hasil = $l[$n] . implode("",$random);
return $hasil;
}
function generate($sisa, $b) {
$string = implode("",$sisa);
$length = count($sisa);
$size = strlen($string);
$str = '';
for( $i = 0; $i < $length; $i++ ) {
$str .= $string[ rand( 0, $size - 1 ) ];
}
Here there is a pair of functions that lets you calculate a permutation set
(no repetitions are taken in account)
function extends_permutation($char, $perm) {
$result = [];
$times = count($perm);
for ($i=0; $i<$times; $i++) {
$temp = $perm;
array_splice($temp, $i, 0, $char);
array_push($result, $temp);
}
array_push($result, array_merge($perm, [$char]));
return $result;
}
function extends_set_of_permutations($char, $set) {
$step = [];
foreach ($set as $perm) {
$step = array_merge($step, extends_permutation($char, $perm));
}
return $step;
}
you can use them to generate the required set of permutations. Something like this:
$seed = "XjYAKpR";
// the first set of permutations contains only the
// possible permutation of a one char string (1)
$result_set = [[$seed[0]]];
$rest = str_split(substr($seed,1));
foreach($rest as $char) {
$result_set = extends_set_of_permutations($char, $result_set);
}
$result_set = array_map('implode', $result_set);
sort($result_set);
At the end of the execution you will have the 5040 permutations generated by your string in the result_set array (sorted in alphabetical order).
Add a char and you will have more than 40000 results.
The functions are quite naive in implementation and naming, both aspects can be improved.
How can I implement the code:
$numberList3 = array();
for($i = 0; $i < 10; $i++)
{
$numberList3[$i] = $i;
}
print_r($numberList3);
Using a foreach loop as the no. of times the loop is going to execute is decided by the user at run time.
Any suggestion.?
Use array_fill maybe?
<?php
$n = 10;
$arr = array_fill(0,$n,0);
foreach($arr as $k => $v) {
$arr[$k] = $k;
}
print_r($arr);
Or, as suggested by #deceze, use range
<?php
$n = 10;
$arr = array();
foreach(range(0,$n-1) as $v) {
$arr[$v] = $v;
}
print_r($arr);
Or when the value is the same as the key, you can use just this:
<?php
$n = 10;
$arr = range(0,$n-1);
// no foreach needed
print_r($arr);
foreach() works for object and array not for a single value.
What you can do create an array or object from users input.
like:
$userInput = 10;
$forEachArray = array_fill(0, $userInput, 0);
$arrayToDisplay = array();
foreach($forEachArray as $key){
$arrayToDisplay[$key] = $key;
}
print_r($arrayToDisplay);