Selecting number from a TXT file

[soltek]

Hey there,

 

this I've no idea how can be done with PHP.

I'm looking for a way to randomly select a 7 digits number from a *.txt and then print it on a webpage.

 

Do any one know how can this be done?

 

 

Thank you.

[QuickOldCar]

here's one way

 

make a text file named numbers.txt same location as this script, or rename it to your text file

<?php
$my_file = "numbers.txt";
if (file_exists($my_file)) {
$data = file($my_file);
$number = $data[rand(0, count($data) - 1)];
echo $number;
} else {
echo "$my_file does not exist";
}
?>

[fugix]

Can use preg_match() to single out the number in the file them echo it

[xyph]

How are you storing these numbers? Separated by commas, linebreaks, etc?

[soltek]

How are you storing these numbers? Separated by commas, linebreaks, etc?

 

by a space, xyph.

 

But I can replace the space for a 'space&comma'

[xyph]

Space is fine

 

untested

<?php 

$data = file_get_contents('yourfile.txt'); // grab the whole file into a variable

$array = explode(' ',$data); // explode the data into an array, by spaces

$max = count($array); // find out how many numbers were returned

echo $array[rand(0,$max)]; // echo out a random value.

?>

[soltek]

It works almost fine.

 

The problem is sometimes it doesnt select anything.

Even in the source code of the rendered page it doesnt print any number.

 

my php code is:

<?php 

$data = file_get_contents('yourfile.txt'); // grab the whole file into a variable

$array = explode(',',$data); // explode the data into an array, by spaces

$max = count($array); // find out how many numbers were returned

echo 'Thizzladen, your lucky number is ', $array[rand(0,$max)]; // echo out a random value.

?>

 

My txt file has this:

 

,00125,14589,

´

 

Any idea?

[fugix]

the leading zeroes could cause an issue... try trimming your values

$var = ltrim($var, '0'); 

[soltek]

fugix, I tried that but I think I did something wrong when editing my code.

 

How would the code look after your tweak?

[fugix]

well you would need to use a foreach() loop to extract the values of the arry and run ltrim() on them...but this would throw off the original $array[rand(0,$max)] logic

[Pikachu2000]

Is it possible that there are some spots in the text file where there are 2 consecutive commas? That's the most likely cause of the occasional empty result, as far as I can see.

[xyph]

You don't want a trailing comma.

 

print_r( $array ); to see what's happening.

[DavidAM]

My txt file has this:

 

,00125,14589,

´

 

Any idea?

You don't want a trailing comma.

 

print_r( $array ); to see what's happening.

 

You don't want a LEADING comma either

[PFMaBiSmAd]

Why not just generate a random 7 digit number when you need one?

[Pikachu2000]

 

My txt file has this:

 

,00125,14589,

´

 

Any idea?

 

 

Wait a second. Is that the only thing in the file?

[soltek]

The commas on the text are there 'cause I thought the problem might be with the space, so I changed to a comma.

Anyway, I also cant generate random numbers, I just need specific ones, those that are in the txt file.

 

I added:

print_r($array)

 

after:

echo $array[rand(0,$max)]

 

And it prints:

 

Array ( [0] => 00125 [1] => 14589 )

or

00125 Array ( [0] => 00125 [1] => 14589 )

or

14589 Array ( [0] => 00125 [1] => 14589 )

 

 

The whole code is:

<?php 

$data = file_get_contents('yourfile.txt'); // grab the whole file into a variable

$array = explode(' ',$data); // explode the data into an array, by spaces

$max = count($array); // find out how many numbers were returned

echo $array[rand(0,$max)]; // echo out a random value.
print_r($array);

?>

And the txt only has those two numbers and one space separating them.

[Pikachu2000]

Assuming you're going to use spaces as the separator, that should work just fine, with one change. Since the array indices start at zero, you need to subtract 1 from the count when calculating $max. Without doing that, the possible values would be 0, 1 and 2, but only index numbers 0 and 1 exist, explaining why you were getting empty values. If you had error reporting on, you should have gotten an undefined index warning.

 

$max = count($array) - 1; // find out how many numbers were returned