$n = 3;
function derde_macht($n) {
return pow($n, 3);
}
{
echo $n . "x" . $n . "x" . $n . "=" . derde_macht(3);
}
How could I make this so that you can choose a parameter for $n = 3;?
Got this :
derde_macht($n) you need to pass your $n in that function instead of derde_macht(3).
$n = 10;
function derde_macht($n) {
return pow($n, 3);
}
{
echo $n . "x" . $n . "x" . $n . "=" . derde_macht($n);
}
Related
For my dynamic navigation I need some help, since I'm still new to PHP.
Using these functions, this file passes the values of the array to a json and a js file.
The correct indexing is particularly important for the function.
$_js_remc->remote_copy($renaming_js_file, $renaming_js_file_to);
$_json_remc->remote_copy($renaming_jsonfile, $renaming_jsonfile_to);
if ($_js_remc->remote_is_writeable($renaming_js_file) && $_json_remc->remote_is_writeable($renaming_jsonfile)) {
$i = 10000;
$menu_string = "document.getElementById('categories_menu').innerHTML='";
for ($z = 0; $z < count($_POST['menu_lvl1_text']); $z++) {
$i = $i + 100;
$menu_string .= '<li>' . htmlentities($_POST['menu_lvl1_text'][$z], ENT_QUOTES, "UTF-8") . '';
$linkname_lvl1 = ($_POST['menu_lvl1_text'][$z]);
$url_lvl1 = ($_POST['menu_lvl1_link'][$z]);
$menu_list[$i] = array($linkname_lvl1 => $url_lvl1);
if (isset($_POST['menu' . $z . '_lvl2_text']) && !empty($_POST['menu' . $z . '_lvl2_text'])) {
$i = $i +1;
$menu_string .= '<ul>';
for ($zs = 0; $zs < count($_POST['menu' . $z . '_lvl2_text']); $zs++) {
$menu_string .= '<li>' . htmlentities($_POST['menu' . $z . '_lvl2_text'][$zs], ENT_QUOTES, "UTF-8") . '';
$linkname_lvl2 = ($_POST['menu' . $z . '_lvl2_text'][$zs]);
$url_lvl2 = ($_POST['menu' . $z . '_lvl2_link'][$zs]);
$menu_list[$i] = array($linkname_lvl2 => $url_lvl2);
$i = $i + 1;
}
$menu_string .= '</ul>';
}
$menu_string .= '</li>';
}
$menu_string .= "';";
As you can see from the code, the json file logically logs the following values.
{
"10100": {
"Lvl_1_1": "Level_1_1"
},
"10101": {
"Lvl1_2": "Lvl1_2"
},
"10102": {
"Lvl1_3": "Lvl1_3"
},
"10203": {
"Lvl_2_1": "Lvl_2_1"
},
"10204": {
"Lvl2_2": "Lvl2_2"
}
}
Problem:
The Sublevel (for ex. "10102") is, of course, to be incremented, but only within it's category, after which the index for the next category shell resume, for example, "10200". Each category has different numbers of sublinks.
The output will look like:
<li id="u_1_0">
<span id="i_1_0"></span>
<ul class="sub">
<li id="u_1_2"><span id="i_1_2"></span></li>
<li id="u_1_3"><span id="i_1_3"></span></li>
Does someone know advice?
If you struggle only with resetting your counter $i, you could just reset the counter after the inner for loop:
if ($_js_remc->remote_is_writeable($renaming_js_file) && $_json_remc->remote_is_writeable($renaming_jsonfile)) {
$i = 10000;
$menu_string = "document.getElementById('categories_menu').innerHTML='";
for ($z = 0; $z < count($_POST['menu_lvl1_text']); $z++) {
$i = $i + 100;
$menu_string .= '<li>' . htmlentities($_POST['menu_lvl1_text'][$z], ENT_QUOTES, "UTF-8") . '';
$linkname_lvl1 = ($_POST['menu_lvl1_text'][$z]);
$url_lvl1 = ($_POST['menu_lvl1_link'][$z]);
$menu_list[$i] = array($linkname_lvl1 => $url_lvl1);
if (isset($_POST['menu' . $z . '_lvl2_text']) && !empty($_POST['menu' . $z . '_lvl2_text'])) {
$oldCounter = $i;
$menu_string .= '<ul>';
for ($zs = 0; $zs < count($_POST['menu' . $z . '_lvl2_text']); $zs++) {
$i = $i + 1;
[...use $i as before...]
}
$i = $oldCounter;
$menu_string .= '</ul>';
}
$menu_string .= '</li>';
}
$menu_string .= "';";
Notice that your ids are not unique. If there are 100 sublinks, you are in trouble!
However, I don't understand your second code block and how it is related to your question.
I'm trying to get search results to paginate if there are greater than 10 items found in the database. For some reason, even though the code recognises there are more than 10 items and creates links for subsequent pages, all search results are listed on the first page only. Anyone able to help please? Code is below:
for($i = 0; $i < $terms_count; $i++)
{
$search_terms_array[$i] = trim($search_terms_array[$i]);
${"query".$i} = $this->mysqli_link->query("SELECT prod_id, prod_tags FROM table WHERE prod_tags LIKE '%" . $search_terms_array[$i] . "%'");
if(${"query".$i}->num_rows < 1)
{
$zerocount++;
}
else
{
$rows = array();
while($row = ${"query".$i}->fetch_array())
{
$rows[] = $row;
}
foreach($rows as $row)
{
$search_id_results[] = $row['prod_id'];
}
}
}
if($zerocount == $terms_count)
{
echo $this->err_handle->fetch_error_text("search_terms_0_results");
return;
}
else
{
$search_results = array_values(array_unique($search_id_results));
$search_results_count = count($search_results);
$search_page_count = ceil($search_results_count / 10);
$search_page_first_result = ($search_page - 1) * 10;
echo '<p>Go to page: ';
for($i = 1; $i <= $search_page_count; $i++)
{
if($i == $search_page)
{
echo " <strong>" . $i . "</strong>";
}
else
{
echo ' ' . $i . '';
}
}
echo '</p><p> </p><p> </p>';
for($i = 0; $i < $search_results_count; $i++)
{
$query = $this->mysqli_link->query("SELECT * FROM table WHERE prod_id='" . $search_results[$i] . "' LIMIT " . $search_page_first_result . ", 10");
while($row = $query->fetch_array())
{
echo "<h4>" . $row['prod_name'] . "</h4><p><img src=\"includes/images/product_images/" . $row['prod_category'] . "/" . $row['prod_pic_filename'] . "\" alt=\"\" width=\"150\" height=\"200\" /></p><p>Price: £" . $row['prod_price'] . "</p><p>" . $row['prod_code'] . "</p><input type=\"number\" name=\"prod_qty\" maxlength=\"2\" /><input type=\"submit\" name=\"add_to_basket\" value=\"Add To Basket\" /></form></p><p> </p><p> </p>";
}
}
echo '<p>Go to page: ';
for($i = 1; $i <= $search_page_count; $i++)
{
if($i == $search_page)
{
echo " <strong>" . $i . "</strong>";
}
else
{
echo ' ' . $i . '';
}
}
echo '</p><p> </p><p> </p>';
}
Ok so I found a solution to this problem and the full function is now as follows:
public function product_search($search_terms, $search_page, $search_flag_check)
{
if($search_flag_check == "invalid")
{
echo $this->err_handle->fetch_error_text("invalid_ns_term");
return;
}
if($search_terms == "")
{
echo $this->err_handle->fetch_error_text("no_search_string");
return;
}
$search_terms = htmlspecialchars($search_terms);
$search_terms = $this->mysqli_link->real_escape_string(filter_var($search_terms, FILTER_SANITIZE_FULL_SPECIAL_CHARS, FILTER_FLAG_NO_ENCODE_QUOTES));
$search_terms_array = explode(" ", $search_terms);
$terms_count = count($search_terms_array);
$zerocount = 0;
$search_id_results = array();
for($i = 0; $i < $terms_count; $i++)
{
$search_terms_array[$i] = trim($search_terms_array[$i]);
${"query".$i} = $this->mysqli_link->query("SELECT prod_id, prod_tags FROM table WHERE prod_tags LIKE '%" . $search_terms_array[$i] . "%'");
if(${"query".$i}->num_rows < 1)
{
$zerocount++;
}
else
{
$rows = array();
while($row = ${"query".$i}->fetch_array())
{
$rows[] = $row;
}
foreach($rows as $row)
{
$search_id_results[] = $row['prod_id'];
}
}
}
if($zerocount == $terms_count)
{
echo $this->err_handle->fetch_error_text("search_terms_0_results");
return;
}
else
{
$search_results = array_values(array_unique($search_id_results));
$search_results_count = count($search_results);
$search_page_count = ceil($search_results_count / 10);
$search_page_first_result = ($search_page - 1) * 10;
$search_page_results_limit = 10;
if($search_page_first_result < 1)
{
$search_page_first_result = 1;
}
echo '<p>Go to page: ';
for($i = 1; $i <= $search_page_count; $i++)
{
if($i == $search_page)
{
echo " <strong>" . $i . "</strong>";
}
else
{
echo ' ' . $i . '';
}
}
echo '</p><p> </p><p> </p>';
$search_page_upper_limit = $search_page_first_result + 9;
if(array_key_exists($search_page_upper_limit, $search_results))
{
$search_results_limit = $search_page_first_result + $search_page_results_limit;
}
else
{
end($search_results);
$search_results_limit = key($search_results);
reset($search_results);
}
for($i = $search_page_first_result; $i <= $search_results_limit; $i++)
{
$query2 = $this->mysqli_link->query("SELECT * FROM table WHERE prod_id='" . $search_results[$i] . "'");
$row = $query2->fetch_array();
echo "<h4>" . $row['prod_name'] . "</h4><p><img src=\"includes/images/product_images/" . $row['prod_category'] . "/" . $row['prod_pic_filename'] . "\" alt=\"\" width=\"150\" height=\"200\" /></p><p>Price: £" . $row['prod_price'] . "</p><p>" . $row['prod_code'] . "</p><input type=\"number\" name=\"prod_qty\" maxlength=\"2\" /><input type=\"submit\" name=\"add_to_basket\" value=\"Add To Basket\" /></form></p><p> </p><p> </p>";
}
echo '<p>Go to page: ';
for($i = 1; $i <= $search_page_count; $i++)
{
if($i == $search_page)
{
echo " <strong>" . $i . "</strong>";
}
else
{
echo ' ' . $i . '';
}
}
echo '</p><p> </p><p> </p>';
}
}
It took a bit of thinking and I was about to give up, but then I thought about using the array keys to calculate the limits for each search page and after a bit of googling on relevant PHP array functions it all fell into place quite well.
I understand the code may not be very tidy right now and there may be ways to optimize/improve it, however for the time being it does the job.
I'm trying to set a checkbox as checked in php based on an hour fields from a comma separated value string. It works well for 1-23 but for some reason hour 0 always displays as checked:
<?php
myhours = explode(",", substr($arruser['arhours'],0,strlen($arruser['arhours']) - 1));
$checked = "";
for($hour = 0; $hour <= 23; $hour++) {
if(count($myhours) > 0) {
for($h = 0; $h <= count($myhours); $h++) {
if((int)$hour == (int)$myhours[$h]) {
$checked = " checked ";
break;
}
}
} else {
$checked = "";
}
if(strlen($hour) == 1) {
echo "<td><input type=checkbox " . $checked . " value=" . $hour . " onchange=\"updatehour(" . $_REQUEST['user'] . ",this.checked, '" . $hour . "')\">0$hour:00</td>";
} else {
echo "<td><input type=checkbox " . $checked . " value=" . $hour . " onchange=\"updatehour(" . $_REQUEST['user'] . ",this.checked, '" . $hour . "')\">$hour:00</td>";
}
$checked = "";
}
?>
The problem is straightforward; look at the outer loop:
for ($hour = 0; $hour <= 23; $hour++) {
Consider only the first iteration, so $hour is int(0). Further in the code:
if(count($myhours) > 0) {
for($h = 0; $h <= count($myhours); $h++) {
Pay close attention to the loop condition:
$h <= count($myhours)
Consider the last iteration of that loop, so $h equals the size of your array.
if ((int)$hour == (int)$myhours[$h]) {
At this point $myhours[$h] is undefined because the array index is out of bounds (and a notice would have been emitted) and so (int)$myhours[$h] becomes (int)null which is int(0). The comparison is therefore always true when $hour has the value of int(0).
The solution is to change the loop condition to:
$h < count($myhours)
Not exactly and answer, but your code could be reduced to this:
$myhours = array(0, 10, 13, 20);
for($hour = 0; $hour <= 23; $hour++) {
echo '<td><input type="checkbox"' . ( in_array($hour, $myhours) ? ' checked' : '' ) . ' value="' . $hour . '" onchange="updatehour(' . $_REQUEST['user'] . ', this.checked, ' . $hour . ')">' . str_pad($hour, 2, '0', STR_PAD_LEFT) . ':00</td>';
}
No need for a second loop and more variables here. Also be aware to not output values from $_REQUEST directly without any check.
Demo
Try before buy
Problem solved. It was actually the count($myhours) that was causing the problem. Basically even with an empty string it still returns an array with 1 element. Changed to check if count($myhours) > 1 and everything is working as expected:
<?php
$myhours = explode(",", substr($arruser['arhours'],0,strlen($arruser['arhours']) - 1));
$checked = "";
for($hour = 0; $hour <= 23; $hour++) {
if(count($myhours) > 1) {
for($h = 0; $h <= count($myhours); $h++) {
if((int)$hour == (int)$myhours[$h]) {
$checked = " checked ";
break;
}
}
} else {
$checked = "";
}
if(strlen($hour) == 1) {
echo "<td><input type=checkbox " . $checked . " value=" . $hour . " onchange=\"updatehour(" . $_REQUEST['user'] . ",this.checked, '" . $hour . "')\">0$hour:00</td>";
} else {
echo "<td><input type=checkbox " . $checked . " value=" . $hour . " onchange=\"updatehour(" . $_REQUEST['user'] . ",this.checked, '" . $hour . "')\">$hour:00</td>";
}
$checked = "";
}
?>
I am trying to display numbers retrieved from the database, in a specific format in a text box.
There are two ways in which the numbers can be displayed.
When the total numbers are 10
in database (4608061019) Expected output 46-0806-1019
When the total numbers are 13
in database (4608061019100) Expected output 46-0806-1019-100
My progress so far:
While saving the value into the database I am using
preg_replace("/[^0-9]/","",$string); // to make sure all hardcoded "-" are removed while storing.
One possible (regex-using) approach:
$str = '4608061019';
$formatted = preg_replace(
'/(^\d{2}|\d{4})(?!$)/', '$1-', $str);
// 46-0806-1019
Demo. This function doesn't check the string's length - it just adds a hyphen after each relevant sequence of symbols (2 right after the beginning, 4 afterwards).
Easy! If you are sure that there are only these two options, then you can do this way:
Convert the number to an array of numbers:
$number = str_split($number);
Check the length:
if (count($number) == 10)
$number = $number[0] . $number[1] . "-" . $number[2] . $number[3] . $number[4] . $number[5] . "-" . $number[6] . $number[7] . $number[8] . $number[9];
else if (count($number) == 13)
$number = $number[0] . $number[1] . "-" . $number[2] . $number[3] . $number[4] . $number[5] . "-" . $number[6] . $number[7] . $number[8] . $number[9] . "-" . $number[10] . $number[11] . $number[12];
Return the number:
return $number;
The full function here:
function tokenize($number)
{
$number = str_split($number);
if (count($number) == 10)
$number = $number[0] . $number[1] . "-" . $number[2] . $number[3] . $number[4] . $number[5] . "-" . $number[6] . $number[7] . $number[8] . $number[9];
else if (count($number) == 13)
$number = $number[0] . $number[1] . "-" . $number[2] . $number[3] . $number[4] . $number[5] . "-" . $number[6] . $number[7] . $number[8] . $number[9] . "-" . $number[10] . $number[11] . $number[12];
return $number;
}
Output
echo tokenize(4608061019);
echo tokenize(4608061019100);
Output
46-0806-1019
46-0806-1019-100
Fiddle: http://codepad.viper-7.com/EVWeFR
Another alternative solution:
$parts = array(2,4,4,3);
$string = "4608061019100";
$i = 0;
$newString = '';
foreach ($parts as $part) {
$newString.=substr($string, $i, $part) ."-";
$i = $i+$part;
}
$newString = rtrim($newString, "-");
Output is:
string '46-0806-1019-100' (length=16)
Works for 46-0806-1019 too.
try it:
//$number = '4608061019';
$number = '4608061019100';
function formatImportantNumber($theNumber){
$formatedNumber = '';
if(strlen($theNumber)==10){
//46-0806-1019
$formatedNumber = substr($theNumber, 0, 2).'-'.substr($theNumber, 2, 4).'-'.substr($theNumber, 6, 4);
}elseif(strlen($theNumber)==13){
//46-0806-1019-100
$formatedNumber = substr($theNumber, 0, 2).'-'.substr($theNumber, 2, 4).'-'.substr($theNumber, 6, 4).'-'.substr($theNumber, 10, 3);
}else{
die('Invalid number formated')
}
return $formatedNumber;
}
echo formatImportantNumber($number);
By default using this code:
$value = check_input($_POST['num']);
If (isset($value) && !empty($_POST['numserials']))
{
for ($a = 1; $a <= $value; $a++)
{
$number = hash('tiger128,3',mt_rand(1000000000,9999999999));
while (file_exists(ROOT . '/intl/codes/' . $number))
{
$number = mt_rand(1000000000,9999999999);
}
file_put_contents(ROOT . '/intl/codes/' . $number,'');
echo $number . '<br>';
//$smarty->assign('number', $number);
}
}
In templated tried foreach, but no luck...
For example, echo give's everything.
Try the following:
$value = check_input($_POST['num']);
$numbers = array();
If (isset($value) && !empty($_POST['numserials']))
{
for ($a = 1; $a <= $value; $a++)
{
$number = hash('tiger128,3',mt_rand(1000000000,9999999999));
while (file_exists(ROOT . '/intl/codes/' . $number))
{
$number = mt_rand(1000000000,9999999999);
}
file_put_contents(ROOT . '/intl/codes/' . $number,'');
$numbers[] = $number;
}
$smarty->assign('numbers', $numbers);
}
in your template file:
{foreach $numbers as $number}
{$number}<br />
{/foreach}