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Closed 3 years ago.
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I have following code:
$source_stat_array = array(0 => 'clicks', 1 => 'impr', 2 => 'spend');
$count = count($source_stat_array);
for ($i = 0; $i < count; $i++) {
echo $source_stat_array[$i++];
}
the result i get is following:
clicks spend
instead of i need
clicks impr spend
can you answer me what is wrong with code?
You are incrementing the value of $i twice.
Try the below code:
for ($i = 0; $i < $count; $i++) {
echo $source_stat_array[$i];
}
You can use foreach it will iterate through each key
foreach($source_stat_array as $key => $value){
echo $value;
}
Read more about foreach , manual
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Closed 5 years ago.
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I want to loop through $i which starts from 790000000 and echo every 100000 up to 799999999:
790000000
790100000
790200000
790300000
790400000
...
I tried this code but it didn't work:
for ($i=790000000; $i<=800000000; $i+100000) {
echo $i . '<br>';
}
For loop wrong code, you are missing actual code update as $i+100000 does not update variable. Use $i += 100000 instead.
// Here is problem in your code
for ($i=790000000; $i<=800000000; $i += 100000) {
echo $i . '<br>';
}
Update your loop using += instead of i.
Only using + will not increment your $i variable value.
for ($i=790000000; $i<=800000000; $i+=100000) {
echo $i . '<br>';
}
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Closed 6 years ago.
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Can you please take a look at this demo and let me know why I am not able to increment the $start as the output is looks like 88888 only
<?php
for($i = 1; $i<= 5; $i++){
$start = 8;
echo $start;
$start++;
}
?>
That is because you always assign your value inside loop , take it out
<?php
$start = 8;
for($i = 1; $i<= 5; $i++){
echo $start;
$start++;
}
?>
If you want to increment the value of start, you must declare it outside of the for loop.
<?php
$start = 8;
for($i = 1; $i<= 5; $i++){
echo $start;
$start++;
}
?>
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Closed 7 years ago.
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
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How do you sort this empty array using foreach loop to output these 25 numbers in order?
Example outcome would be: 1 1 1 1 1 2 2 2 2 3 3 3 3 3 4 4 4 4
<?php
$array = array();
for($counter = 0; $counter <=25; $counter++){
$die = rand(1, 10);
$int[$counter] = $die;
echo " $die ";
}
sort($die);
foreach ($die as $value)
{
echo '<option value="'.$value.'">'.$value.'</option>';
}
?>
<?php
$array = array();
for ($i = 0; $i <=25; $i++) {
echo $array[] = rand(1, 10);
}
sort($array);
foreach ($array as $value) {
echo '<option value="'.$value.'">'.$value.'</option>';
}
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Closed 8 years ago.
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i have php script to do for loop, it supposed to loop over the code once and then exit,but theses not happening, it keep looping till i exited manually.
my code
<?php
session_start();
?>
<?php
ignore_user_abort(true);
for( $x=0; $x< 50; )
{
$_SESSION['timeout'] = time();
$st = $_SESSION['timeout'] + 1;
session_unset();
$_SESSION['timeout'] = time();
$st = $_SESSION['timeout'] + 1;
print_r("$st\n");
}
if(time() < $st)
{
file_put_contents('/tmp/phptest1234.txt', 'test');
}
?>
Below is an infite loop. $x always stays at 0.
for( $x=0; $x< 50; )
You need to do:
for( $x=0; $x< 50; $x++)
php man "for"
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I am getting a problem please help me.
this is my array
Array
(
[0] => subject7
[1] => subject6
[2] => subject5
[3] => subject3
[4] => subject2
)
and my array size is 5
$sub= array();
for($j=0; $j<=$size; $j++)
{
$sub[] = $subject_value[$subject[$j]];
}
but it is giving me a error message Undefined offset: 5
The error occured because you dont have a 5th element in the array.So change the code like the following
$sub= array();
for($j=0; $j<$size; $j++)
{
$sub[] = $subject_value[$subject[$j]];
}
In this case
$j <= $size
will iterate the loop 6 times and so it looks for the 6th element which is $size[5] since the key starts from 0 and you dont have a 6th or $size[5] element in the array.So you will get the error.So you need to iterate the loop 5 times as your array size is 5.So you have to change the condition as $j < $size in the for loop.
change
$j<=$size
to
$j<$size
do
for($j=0; $j<$size; $j++)
$sub= array();
for($j=0; $j<=$size; $j++)
{
$sub[] = $subject_value[$subject[$j]];
}
should be
$sub= array();
for($j=0; $j<$size; $j++)
{
$sub[] = $subject_value[$subject[$j]];
}
You are using the <= operator and it also check the index number 5 and make the condition true for this index. Even though there is only indexs till 4.
for($j=0; $j<$size; $j++)
change it to < operator according to above code as there is only index 4 from 0 and then it make 5 array element.
To avoid such common mistakes, you could use a foreach loop:
foreach($subject as $item){
//work here
}
This way you will never try to access a non-existing element (in your case $subject[5]).