Re: Problems converting strings with 0 to integer
| From: | Richard Quadling | Date: | Thu, 04 Nov 2010 10:33:02 +0000 |
| Subject: | Re: Problems converting strings with 0 to integer | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-309285@lists.php.net to get a copy of this message | ||
On 3 November 2010 21:42, Alexander Holodny <alexander.holodny@gmail.com> wrote:
> To exclude unexcepted behavior in case of wrongly formated input data,
> it would be much better to use such type-casting method:
> intval(ltrim(trim($inStr), '0'))
>
> 2010/11/3, Nicholas Kell <nick@monkeyknight.com>:
>>
>> On Nov 3, 2010, at 4:22 PM, robert mena wrote:
>>
>>> Hi,
>>>
>>> I have a text file (utf-8 encoded) which contains lines with numbers and
>>> text separated by \t. I need to convert the numbers that contains 0 (at
>>> left) to integers.
>>>
>>> For some reason one line that contains 00000002 is casted to 0 instead of
>>> 2.
>>> Bellow the output of the cast (int) $field[0] where I get this from
>>> explode each line.
>>>
>>> 0 00000002
>>> 4 00000004
>>
>>
>>
>> My first guess is wondering how you are grabbing the strings from the file.
>> Seems to me like it would just drop the zeros on the left by default. Are
>> you including the \t in the string by accident? If so, that may be hosing
>> it. Otherwise, have you tried ltrim on it?
>>
>> Ex:
>>
>> $_castableString = ltrim($_yourString, '0');
>>
>> // Now cast
<?php
// Create test file.
$s_TabbedFilename = './test.tab';
file_put_contents($s_TabbedFilename, "0\t00000002" . PHP_EOL .
"4\t00000004" . PHP_EOL);
// Open test file.
$fp_TabbedFile = fopen($s_TabbedFilename, 'rt') or die("Could not open
{$s_TabbedFilename}\n");
// Iterate file.
while(True)
{
if (False !== ($a_Line = fgetcsv($fp_TabbedFile, 0, "\t")))
{
var_dump($a_Line);
foreach($a_Line as $i_Index => $m_Value)
{
$a_Line[$i_Index] = intval($m_Value);
}
var_dump($a_Line);
}
else
{
break;
}
}
// Close the file.
fclose($fp_TabbedFile);
// Delete the file.
unlink($s_TabbedFilename);
outputs ...
array(2) {
[0]=>
string(1) "0"
[1]=>
string(8) "00000002"
}
array(2) {
[0]=>
int(0)
[1]=>
int(2)
}
array(2) {
[0]=>
string(1) "4"
[1]=>
string(8) "00000004"
}
array(2) {
[0]=>
int(4)
[1]=>
int(4)
}
intval() operates as standard on base 10, so no need to worry about
leading zeros' being thought of as base8/octal.
What is your code? Can you reduce it to something as small like the
above to see if you can repeat the issue?
--
Richard Quadling
Twitter : EE : Zend
@RQuadling : e-e.com/M_248814.html : bit.ly/9O8vFY