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I have one question to you, and I hope you will help me. I want to write calculator but i don't have chance tu change operations , I can only use addition operation. I don't know what happened. can anyone help me?
look at it, what happened?
<?php
$x = isset($_POST['field']);
if($x == 1){
echo $x + 5;
}
elseif($x == 2){
echo $x - 5;
}
?>
You code is wrong as this line will evaluate only as 0 (false) or 1 (true) if condition is met:
$x = isset($_POST['field']);
You need to do it that way:
$x = isset($_POST['field']) ? $_POST['field'] : 0;
(where 0 is default value, $x is assigned to in case there's no $_POST['field]` set.
$x = isset($_POST['field']) ? (int)$_POST['field'] : 0;
You want the value, not the boolean if it's set or not.
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I want split one group AS follow
splitGroups("11133355557777") ➞ ["111", "333", "5555", "7777"]
Anyone have idea then let me know
With php version 5 above this will work link to execute
Link to an example https://paiza.io/projects/qfRZ07OP3OviWCVsUbdFtQ
function splitGroups($str){
$arr = [];
$i=0;
$sub = '';
while($i!=strlen($str))
{
$sub .= $str[$i];
if ( strlen($str)-1 == $i || $str[$i] != $str[$i+1] ){
$arr[] = $sub;
$sub='';
}
$i++;
}
return $arr;
}
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How to replace 200 numbers with an image?
This example :
For example
When user have 200 numbers He takes 1 image
When user have 830 He take 4 image
what php code I need it?
Sorry but I havn't Any code
Thanks in advance
$votes = 10334;
$starCount = intval($votes/ 200);
$starCount = $starCount > 5 ? 5 : $starCount; //if maximum 5 stars
$a = 1;
$starsString = '';
for ($a; $a <= $starCount; $a++) {
$starsString .= '⛤'; // or '<img src="https://i.stack.imgur.com/EhAy4.gif" alt="here">'
}
echo $starsString;
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If i have a loop for example
for ($a=1; $a<6; $a++)
Is it possible to say for the first loop if another variable like $b is the same as one of the other numbers that will come like 2, 3, 4 or 5.
And what if i have a word split, so every letter is a variable like this:
$letter1 = str_split($word)[0];
$letter2 = str_split($word)[1];
$letter3 = str_split($word)[2];
$letter4 = str_split($word)[3];
$letter5 = str_split($word)[4];
How can i check if $a is at 1 in the loop,if it is not letter1 but letter2, 3, 4 or 5?
sure. Just check it against the counter:
for ($a=1; $a<6; $a++){
if ($a===$b){
echo ("b is caught!");
break;
}
}
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Can anyone explain in depth why this outputs 9
here is my code in PHP:
$x = 4;
$x = $x+++$x++;
echo $x;
Execution goes like this:
$x = $x++ + $x++; ($x = 4)
$x = 4 + $x++; ($x = 5)
$x = 4 + 5; ($x = 6)
$x = 9;
For a more detailed answer of a more complex example in Java, see this answer: Incrementor logic
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I have a math function, for example:
string = "3x+6.5y-23z"
I need to extract the function and get x, y, z; give value x = 6, y = 7, z = 8; and solve.
you can do it like this
<?php
$x = 6;
$y = 7;
$z = 8;
echo $string = 3*$x+6.5*$y-23*$z;
?>