how to append numbers into string in php

Question

I have a for loop like this in php

<?php
for($i=0;$i<=100;$i++)
{
echo $i;
}

What I need is, I want to generate roll number using this for loop like this.

SN0001  
SN0002  
SN0003  
.....  
SN0010  not SN00010
......  
SN0100  not SN000100

I have tried this

  <?php
  for($i=0;$i<=100;$i++) {
  $str='SN00'.$i;
  echo $str;
  }
  ?>

Note this (SN0010 and SN0100). I need SN0010,SN0100 not SN00010, SN000100.

What should I do for that?

Have you tried anything?

Rizier123
– Rizier123

2015-03-02 07:09:26 +00:00
Commented Mar 2, 2015 at 7:09 — Rizier123
– Rizier123, Commented Mar 2, 2015 at 7:09
I dont know how to do that? That's why asking.

Praveen Srinivasan
– Praveen Srinivasan

2015-03-02 07:13:14 +00:00
Commented Mar 2, 2015 at 7:13 — Praveen Srinivasan
– Praveen Srinivasan, Commented Mar 2, 2015 at 7:13

Raptor · Accepted Answer · 2015-03-02 07:04:21Z

3

You can use str_pad() function:

<?php
for($i=0;$i<=100;$i++) {
  echo 'SN' . str_pad($i, 4, STR_PAD_LEFT, '0');
}
?>

answered Mar 2, 2015 at 7:04

Raptor

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Comments

Jakir Hossain · Accepted Answer · 2015-03-02 08:24:02Z

2

Please try this code-

    for($i=0;$i<=100;$i++) {
      echo 'SN' .sprintf("%'.04d\n", $i);
    }

edited Mar 2, 2015 at 8:24

Jakir Hossain

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answered Mar 2, 2015 at 7:09

Pramod Sivadas

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Comments

Jakir Hossain · Accepted Answer · 2015-03-02 07:14:20Z

1

for($i=0;$i<=100;$i++)
{
    if($i<=9){      
        $zeroValue = '000';
    }
    elseif($i>9 && $i<=99){
        $zeroValue = '00';
    }
    elseif($i>99 && $i<=999){
        $zeroValue = '0';
    }
echo 'SN'.$zeroValue.$i.'<br>';
}

answered Mar 2, 2015 at 7:14

Jakir Hossain

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3 Comments

Sarower Jahan Over a year ago

I think this php loop is exactly correct and simple to use.

Raptor Over a year ago

well, max value of $i is 100, thus, $i <= 999 is somehow inaccurate (working though).

Jakir Hossain Over a year ago

I have given a limitation. If a user try to more than this value.

priya786 · Accepted Answer · 2015-03-02 07:30:15Z

1

  <?php
  for($i=0;$i<=100;$i++) {
  $str='SN00'.$i;
  if(strlen($str)<6)
  {
    $str='SN000'.$i;
  }
  if(strlen($str)>6)
  {
    $str='SN0'.$i;
  }
  echo $str;
  }
  ?>

edited Mar 2, 2015 at 7:30

answered Mar 2, 2015 at 7:10

priya786

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