I have some data outputting via PHP/MySQL. It's simply a list of Chinese characters that corresponds to a certain string.
$i = 0;
while ($i <= $x) {
echo "<div class=\"char-option\">" . $results[$i]['mainchar'] . "</div>";
$i++;
}
I have another row with a character ranking in it, about 20% of the characters have a ranking. I would like to:
Change the class to "char-option char-common" for the character with the highest ranking.
Don't change the class if none of the characters have a ranking.
Thanks in advance.
Step 1: Determine, WHICH character has the highest rank.
$high = -1, $hrank = 0;
for($i = 0; $i <= $x; ++$i) {
if(isset($results[$i]['rank']) && $hrank < $results[$i]['rank']) {
$high = $i;
$hrank = $results[$i]['rank'];
}
}
Step 2: With the information, which has the highest character ranking, we can determine, who gets the normal class and who gets the additional class.
for($i = 0; $i <= $x; ++$i) {
$class = "char-option"; //Default class
if($i == $high) $class .= " char-common"; //Adds the second class for the highest ranked character.
echo "<div class=\"$class\">" . $results[$i]['mainchar'] . "</div>";
}
The -1 in $high makes sure, that the class will not be changed, unless there is a ranking somewhere within the list.
set your ranking in the result and do in this way.
$i = 0;
while ($i <= $x) {
if ($results[$i]['highest_ranking'] == 1) {
$class = "char-option char-common";
} else {
$class = "char-option";
}
echo "<div class=\"$class\">" . $results[$i]['mainchar'] . "</div>";
$i++;
}
Related
Below is the code i tried, where count is showing improper.
Please help me to get where i am missing the logic.
I am attaching the code which i have tried so far.
PS Note:- I am not intended to use more built in function of php and so I created function for string length.
error_reporting(E_ALL);
$string = "ssddk";
function checkString($addinString, &$stringBK) {
if (empty(count($stringBK))) {
$stringBK[] = $addinString;
return false;
}
foreach ($stringBK as $key => $val) {
if ($addinString == $val) {
return true;
}
}
$stringBK[] = $addinString;
return false;
}
for ($i = 0; $i < checkstrlength($string); $i++) {
$count = 0;
for ($j = 0; $j < checkstrlength($string); $j++) {
if ($string[$i] == $string[$j]) {
if (checkString($string[$i], $stringBK)) {
continue 2;
}
$count++;
echo "Column => " . $string[$j] . " for count" .$count . "<br>";
}
}
}
function checkstrlength($string) {
$count = 0;
for ($i = 0; $string[$i] != ""; $i++) {
$count++;
}
return $count;
}
It gives below output ,
Column => s for count1
Column => d for count1
Column => k for count1
I am expecting it as ,
Column => s for count 2
Column => d for count 2
Column => k for count 1
Ok, there a couple of things to look at here.
The checkstrlength() has the below loop.
for ($i = 0; $string[$i] != ""; $i++) {
Formally speaking, we usually look at \0 terminating character in the string to terminate our loop. But in PHP, everything is a string. So, \0 is now a string to match on rather than a character match. Better, we do an isset check to stop our loop. So, code would look like:
for ($i = 0; isset($string[$i]); $i++) {
Second is your not caching the result which you got from checkstrlength(). Do it. Also, you can start the inner loop from $i itself. There is no need to go from start again. So, for loop would look like:
$length = checkstrlength($string);
for ($i = 0; $i < $length; $i++) {
for ($j = $i; $j < $length; $j++) {
Third is that there is no need of empty and count checks in checkString. This also reduces inbuilt function calls. You can simply loop over and return true if found. If not found, we are adding it anyway. So it would look like:
function checkString($addinString, &$stringBK) {
foreach ($stringBK as $key => $val) {
if ($addinString == $val) {
return true;
}
}
$stringBK[] = $addinString;
return false;
}
Now, in your nested loop, you add it to $stringBK outside of the inner loop, because there is no point in checking with the inner loop when chars match. This is because if some character was visited, why initialize the inner loop at all. Just have a check above and continue the search and count. Also note that you are having echo statements inside the inner loop which doesn't make sense because we haven't finished the count yet. Let's do and print it outside of the inner loop at the end. Snippet as follows:
for ($i = 0; $i < $length; $i++) {
$count = 0;
if (checkString($string[$i], $stringBK)) {
continue;
}
for ($j = $i; $j < $length; $j++) {
if ($string[$i] == $string[$j]) {
$count++;
}
}
echo "Column => " . $string[$i] . " for count : " .$count,PHP_EOL;
}
Final Code Demo: https://3v4l.org/4dpST
Please give me the solution for to print a triangle in stars pattern using php language. I used only 2 for loops to finish this.
*
***
*****
*******
Here is my code
<?php
for($a=1;$a<=7;$a++)
{
for($b=1;$b<=$a;$b++)
{
echo " *";
}
echo "<br/>";
}
echo " ";
?>
Please help me out.
<?php
for($i=0; $i < 5 ; $i++)
{
echo"<br>";
for($j=0; $j <=$i ; $j++){
echo "*" ;
}
}
?>
For more php Star patterns
This will work, still uses two for loops:
echo "<pre>";
$stars = "*";
for($a=1; $a<=4; $a++)
{
$spaces = "";
for($b = (5 - $a); $b>1; $b--)
{
$spaces .= " ";
}
echo $spaces . $stars . $spaces;
$stars .= "**";
echo "<br/>";
}
echo "</pre>";
I've used an accumulator for $stars, it starts from one star, an adds two stars at each iteration, and one accumulator for $spaces, that gets reset at each main for iteration.
The triangle is build top to bottom using one layer at a time.
One layer is made of spaces, stars and spaces again
for($x = 0; $x < $n; $x++) {
for($y = 0; $y < $n - $x; $y++) {
echo ' ';
}
for($z = 0; $z < $x * 2 +1; $z++) {
echo 'x';
}
echo "\n";
}
I'm trying to echo stars and zero like the pattern below
*
***0
******00
**********000
The length of the asterisks grows by an increasing factor (in a ballooning fashion) -- the previous number of asterisks plus the current iteration number.
iteration 1: 1 (0 + 1)
iteration 2: 3 (1 + 2)
iteration 3: 6 (3 + 3)
iteration 4: 10 (6 + 4)
iteration 5: 15 (10 + 5)
etc
The length of the zeros increases by a static factor.
iteration 1: 0
iteration 2: 1
iteration 3: 2
iteration 4: 3
iteration 5: 4
etc
My code currently looks like this:
for ($i=0; $i<=10; $i++)
{
echo "*";
for ($j=0; $j<$i; $j++)
{
echo "*";
}
for ($z=0; $z<$i; $z++)
{
echo "0";
}
echo "</br>";
}
However I'm getting this result:
*
**0
***00
****000
*****0000
******00000
The number of stars is indicated by triangle numbers, 1, 1+2, 1+2+3. You want to increment your inner loop max value by $i with every iteration:
$k = 0;
for ($i=1; $i<=10; $i++)
{
$k += $i;
for ($j=1; $j<=$k; $j++)
{
echo "*";
}
...
}
This is also a good case where your loops should be initialized with 1 rather than 0, because it is more intuitive. 0-based loops work best when you are working with arrays.
I think something like this is more efficient; you can cache the current sequence of stars and zeros.
$cache_star = "";
$cache_zero = "";
for ($i=1; $i<=10; $i++)
{
for ($j=1; $j<=$i; $j++)
{
$cache_star .= "*";
}
echo $cache_star.$cache_zero;
$cache_zero .= "0";
}
Here's what I got:
for($i = 1; $i != 5; $i++)
{
$triangle = (0.5 * $i) * ($i + 1);
echo str_repeat('*', $triangle) . str_repeat('0', $i) . PHP_EOL;
}
Uses the formula 0.5n(n + 1) - the triangle numbers formula.
Example output:
*0
***00
******000
**********0000
I quite like #jordandoyle's approach, but I correct the zeros pattern by subtracting 1 from $i in the second str_replace()..
Code: (Demo)
$number = 5;
for ($i = 1; $i <= $number; ++$i) {
echo str_repeat('*', $i * .5 * ($i + 1))
. str_repeat('0', $i - 1)
. PHP_EOL;
}
Output:
*
***0
******00
**********000
***************0000
If this answer lacks significant uniqueness versus an earlier answer, I'll include a recursive approach as well (instead of a classic loop).
Code: (Demo)
function printLines($i, $lines = [], $newline = PHP_EOL) {
if ($i > 0) {
array_unshift(
$lines,
str_repeat('*', $i * .5 * ($i + 1))
. str_repeat('0', $i - 1)
);
printLines(--$i, $lines);
} else {
echo implode($newline, $lines);
}
}
printLines(5);
You can even copy the previous line and insert it into the middle of the next line to form the desired pattern. This is the functional-style equivalent of #CoertMetz's nested loop technique.
Code: (Demo)
$number = 5;
$line = '';
for ($i = 1; $i <= $number; ++$i) {
echo (
$line = str_repeat('*', $i)
. $line
. ($i > 1 ? '0' : '')
)
. PHP_EOL;
}
All above techniques deliver the same result.
Smells like homework... But ok, what about this:
$star = "*";
echo $star."\n";
for ($i=0; $i<=10; $i++)
{
$star = $star."**";
echo $star;
echo str_repeat("0", $i+1);
echo "\n";
}
Outcome:
*
***0
*****00
*******000
*********0000
***********00000
*************000000
***************0000000
*****************00000000
*******************000000000
*********************0000000000
***********************00000000000
Demo:
http://sandbox.onlinephpfunctions.com/code/583644f782005adb9e018b965cbbdefaf63c7c79
Morning, I have a script tha is calling entries from a database, their history actually, and then displays the entries in a table, right now in order to create the table im using a pretty big for loop to make comparisons and add the results in. However for some reason it is timing out after the 30 seconds(the loop doesnt make that many cycles) i have dtermined that the cause is an issue with the first inner loop due to the fact that the echo statement in there just repeats for the duration of the loop, it never leaves that. any ideas?
for($i = 1; $i <= $FirstCount; $i++)
{
$HistoryTable .= "<tr>";
if($i = 1)
{
for($j = 0; $j < $ThirdCount; $j++)
{
if($EntryTwo[0][$j+1] == $EntryOne[$j])
{
$HistoryTable .= "<td></td>";
}
else
{
$HistoryTable .= "<td>".$EntryTwo[0][$j+1]."</td>";
}
echo $EntryTwo[0][$j+1].' == '.$EntryOne[$j];
}
}
else
{
$first = 0;
$second = 1;
for($k = 1; $k <= $SecondCount; $k++)
{
if($EntryTwo[$first][$k] == $EntryTwo[$second][$k])
{
$HistoryTable .= "<td>".$EntryTwo[$second][$k]."</td>";
}
else
{
$HistoryTable .= "<td></td>";
}
$first++;
$second++;
}
unset($k);
unset($first);
unset($second);
}
$HistoryTable .= "</tr>";
}
variables:
$FirstCount = 4;
$SecondCount = 18
$ThirdCount = 17
if($i = 1) is setting $i to 1 every time, so it's an infinite loop.
What you want is if ($i == 1).
Stuck with the number pattern printing logic. Let me know what i am doing wrong as my file is simply going on execution without giving me a pattern.
My Code --
<?php
$num = 4;
for( $j=1 ; $j <= $num ; $j++ )
{
for( $i=$j ; $i < $num-1 ; $i++ )
{
echo " ";
}
for( $j ; $j >= 1 ; $j-- )
{
echo $j." ";
}
echo "<br />";
}
Pattern to achieve --
1
21
321
4321
UPDATE
After applying new changes following are the screenshots ---
for ($i = 1; $i <= 4; $i++) {
echo str_pad(implode('', range($i, 1)), 4, ' ', STR_PAD_LEFT) . '<br />';
}
Right aligned using CSS
echo '<div style="text-align:right;">';
for ($i = 1; $i <= 4; $i++) {
echo implode('', range($i, 1)) . '<br />';
}
echo '</div>';
Your error is in the last for, that should not exist since you are already looping.
And create a new variable which will hold the printed text for the next increment.
<?php
$num = 4;
$wrap = '';
for( $j=1 ; $j <= $num ; $j++ )
{
for( $i=$j ; $i < $num ; $i++ )
{
echo " ";
}
echo $wrap = $j.$wrap;
echo "<br />";
}
?>
The fundamental reason is that a browser wont render multiple spaces only the first one, you can overcome this by using the non breaking space html entity   in place of spaces.
Soooo, If you want your actual pattern to look like:
1
21
321
4321
And not like:
1
21
321
4321
Use   (Edit: Tho actually use [space] as just 1 seems to not compensate for the width of the 1 char vs 4)
<?php
$num = 4;
$result = array();
foreach(range($num,1) as $i){
$result[] = str_repeat(' ',$num-$i).implode('',range($i,1)).'<br />';
}
echo implode('',array_reverse($result));
?>
Or you could use a <pre> tag like:
<?php
$num = 4;
$result = array();
foreach(range($num,1) as $i){
$result[] = str_repeat(' ',$num-$i).implode('',range($i,1)).PHP_EOL;
}
echo '<pre>'.implode('',array_reverse($result)).'</pre>';
?>
As it is right now, the problem lies in your third (or second nested) for loop.
You can't just reuse $j as a counter here, since $j is still being actively used in the encompassing for loop. Substitute that for loop with:
for( $k = $j ; $k >= 1 ; $k-- )
{
echo $k." ";
}
Here is the code for your program, You can go to Develepor hell for more such pattern
// Outer look for line change
for ($i = 1; $i<=5; $i++) {
// Loop added for spacing
for ($s = $i; $s<=10-$i; $s++) {
echo " ";
}
// Inner loop for printing required pattern
for ($j = $i; $j>=1; $j--) {
echo $j;
}
echo '</br>';
}
// Here is the code for your program,
// Pattern - 1
$num = 4;
// to print no. of rows
for( $i=1 ; $i <= $num ; $i++ )
{
// To print white space
for( $j=1 ; $j <= $num-$i ; $j++ )
{
echo "0";
}
// To print pattern
for( $z= $i ; $z>=1 ; $z-- )
{
echo $z;
}
// To print new line
echo "<br />";
}
==>> Output
0001
0021
0321
4321
//===================================================================//
Pattern - 2
$z=1;
$n=3;
# no of rows
for($i=1;$i<=$n;$i++)
{
# to check even or odd
if($i%2 == 0)
{
# main logic to display in reverse order // right to left
$z = ($z+$n) -1;
$a = $z;
for($j=1;$j<=$n;$j++)
{
echo $z--;
}
$z = $a+1;
}
else
{
# display data left to right
for($j=1;$j<=$n;$j++)
{
echo $z++;
}
}
echo "<br/>";
}
==>> Output
123
654
789
Your issue appears to be that you are printing your output into an HTML document which condenses multiple spaces as its default behavior. See "Why does HTML require that multiple spaces show up as a single space in the browser?" To "preserve" whitespaces while printing, use the <pre> tag.
I'll add a math-based solution instead of multiple iterated function calls and multiple loops (inspired by my explained answer here). Once your number limit gets higher than 9, I don't know if my output will align with your desired output.
Effectively, I use printf() to left-pad every line with spaces to the same max length. Each successive number prints the integer as many times as its value.
Code: (Demo)
$num = 4;
echo "<pre>";
for ($i = 1; $i <= $num; ++$i) {
printf("% {$num}d<br>", (10 ** $i - 1) / 9 * $i);
}
HTML Output (click on the eye icon in the demo link to switch to HTML mode):
1
22
333
4444
For comparison these also work inside of the for() loop (and offer a more intuitive result above 9):
printf("% {$num}d<br>", str_repeat($i, $i));
Or
echo str_repeat(' ', $num - $i) . str_repeat($i, $i) . "<br>";