[RESOLVED] String to array

NZ_Kiwis

I have a string
11/34/45/2/43/212/
I want to split to this at the / to an array, How can I do this?

wilku

$arr = split('/','11/34/45/2/43/212/');

NZ_Kiwis

Yeah but sorry I should have said, this will be set at run time. It might be just 1/ it could be 1/22/32 or it could be 1/2/53/223/43/5/3

wilku

I see no difference:

$str = '11/34/45/2/43/212/' //or whatever runtime setting
$arr = split('/',$str);

Weedpacket

Although see the note on the [man]split[/man] page.

halojoy

We can do some tests
I suggest the following

<?php

$str = '11/33/';  // will return array with 3 elements, last empty
$str = '11/';  // will return array with 2 elements, last empty
//$str = '11';  // will return array with 1 element, '11'
//$str = ' /';    // will return array with 2 element, space + empty
//$str = '/';    // will return array with 2 element, both empty
//$str = '';    // will return array with 1 element, empty

///////////////////////////////////////////////////////////////////////

//$str = trim( $str );  // if needed remove spaces

//$str = rtrim( $str, '/' ); // remove trailing '/'
//$arr = split( '/', $str );
// same as:
$arr = split('/', rtrim($str, '/'));

if( empty($arr[0]) ){  // note that 1 space is not = empty
    $arr = array();
}
echo count( $arr ); // will give you number of numbers in the string

echo '<br />';
var_dump($arr);

mpb001

Use explode unless you want regex capability.

http://uk.php.net/manual/en/function.explode.php

"Tip

preg_split(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to split(). If you don't require the power of regular expressions, it is faster to use explode(), which doesn't incur the overhead of the regular expression engine."

On the split page.

Dann

You can use explode()

<?php
$string = '11/34/45/2/43/212/' ;
$array = explode('/',$string);
echo $array[1]; // displays 34
?>
if you want to display all values of array, you can use foreach()

kiwi2

explode is the correct way to go on this
easy fast and FOR EACH YOU SHALL HAVE A RESULT::!!
explode('/', $string);
as above

NZ_Kiwis

How would loop through each one??

bradgrafelman

Using [man]foreach/man is one way to loop through an array.

halojoy

Dann wrote:
You can use explode()

<?php
$string = '11/34/45/2/43/212/' ;
$array = explode('/',$string);
echo $array[1]; // displays 34
?>
if you want to display all values of array, you can use foreach()

I agree with Dann, explode is to prefer from split.
But anyhow dont forget to take my advice, in previous post above
make a right trim of '/' off your string before explode.

<?php

error_reporting( E_ALL );

$string = '11/34/45/2/43/212/';

// will make it: '11/34/45/2/43/212'
$string = rtrim( $string, '/' );

$arr = explode( '/', $string ); 

// loop and call each value of $arr: $num and display it
foreach( $arr AS $num ){
    echo '=> ' . $num . '<br />';
}

Arc

I agree with using explode, however, I always use a for loop when iterating thru arrays.

$theString="1/2/3/4/5/6/7/";

$theArray=explode("/",$theString);

//If you know for sure you are always going to have a "/" at the end of the string 
//then use count($theArray)-1 else use count($theArray)

for($i=0; $i<count($theArray)-1; $i++){

echo $theArray[$i];

}//end for

bradgrafelman

Arc wrote:
I always use a for loop when iterating thru arrays.

Always? What about for an array like this:

$arr = array('name' => 'Brad', 'foo' => 'bar');

Your [man]for/man loop wouldn't retrieve any data from that array.

That's why I only mentioned [man]foreach/man - without knowing what type of array you have, you can lose data when using a for() loop (even with numerical indexes).

halojoy

bradgrafelman wrote:
That's why I only mentioned [man]foreach/man
- without knowing what type of array you have,
you can lose data when using a for() loop (even with numerical indexes).

I was using for loops a lot before.
But since I have began to love foreach,

I have this rule:

If possible I use foreach.
When this will not be the best, most effective, choice, I will go for for or while loops instead.

Regards

suntra

Arc wrote:

I agree with using explode, however, I always use a for loop when iterating thru arrays.

$theString="1/2/3/4/5/6/7/";

$theArray=explode("/",$theString);

//If you know for sure you are always going to have a "/" at the end of the string 
//then use count($theArray)-1 else use count($theArray)

for($i=0; $i<count($theArray)-1; $i++){

echo $theArray[$i];

}//end for

Should be "for($i=0; $i<count($theArray); $i++){" since you use "smaller than"...