How to extract useful information from a string with PHP - php

Question

I'm using a string that is composed the following way:
0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30
First four characters: The number of registries to be processed.
String "customer-": Defines the table to be used
The next part of the chain is defined as a key => value for a string (uuid_short => remote id)
I need to separate each part of the chain so it can be processed locally.
I tried using substrings, explode and the following loop:
$array = explode(" ", $string);
for($i = 0, $b = 0; $b < $num_of_registries; $i = $i + 2, $b++)
{
$local = $array[$i];
$remote = $array[$i+1];
// store values in array
$inserted = array();
$inserted['local'] = $local;
$inserted['remote'] = $remote;
$array_inserted[] = $inserted;
}
foreach ($array_inserted as $key => $value)
{
echo $value["local"].' => '.$value["remote"].' <p>';
}
But the loop only works with single character value pairs.

Answer 1

Voila.
if (preg_match("#^([0-9]+)(.*?)-(.*)#", $string, $out)) {
echo "number: ".$out[1]."\n";
echo "table: ".$out[2]."\n";
if (preg_match_all("#([0-9]+) ([0-9]+)#", $out[3], $res, PREG_SET_ORDER))
foreach ($res as $r) echo "$r[1] => $r[2]\n";
}
Result
number: 0003
table: customer
23892644362977289 => 28
23892644362977293 => 29
23892644362977294 => 30

Answer 2

Due to the lack of a representation, this is merely speculative.
This is what I came up with:
<?
$string='0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30';
$array = explode('-', $string);
$header = current( $array );
$times = (int)$header;
$data = array();
$data[$key = substr($header, 4)] = explode(' ', $array[1]);
print_r($data);
Should output:
Array
(
[customer] => Array
(
[0] => 23892644362977289
[1] => 28
[2] => 23892644362977293
[3] => 29
[4] => 23892644362977294
[5] => 30
)
)
If you want key=>value, you may want this:
$string='0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30';
$array = explode('-', $string);
$header = current( $array );
$times = (int)$header;
$key = substr($header, 4);
$data = array("$key"=>array());
$content = explode(' ', $array[1]);
for($i=0;$i < $times * 2;)
{
$data[$key][$content[$i++]]=$content[$i++];
}
print_r($data);
Which prints:
Array
(
[customer] => Array
(
[23892644362977289] => 28
[23892644362977293] => 29
[23892644362977294] => 30
)
)
Or this:
$string='0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30';
$array = explode('-', $string);
$header = current( $array );
$times = (int)$header;
$key = substr($header, 4);
$data = array("$key"=>array());
$content = explode(' ', $array[1]);
for($i=0;$i < $times * 2;)
{
$data[$key][$content[1+$i++]]=$content[$i++-1];
}
print_r($data);
Which prints:
Array
(
[customer] => Array
(
[28] => 23892644362977289
[29] => 23892644362977293
[30] => 23892644362977294
)
)
Edit:
Removed the $times * 2 on every explode(), in case the input comes as 0001customer-23892644362977289 28 23892644362977293 29 23892644362977294 30 (notice the 0001).

Answer 3

I suck at regex, so I like to write regular PHP code so I know what's going on. Here you go:
$input = "0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30";
$resistry_count = substr($input, 0, 4); // example: '0003'
$table = substr($input, 4, strpos($input, '-') - 4); // example: 'customer'
$data = substr($input, strpos($input, '-') + 1); // example: '23892644362977289 28 23892644362977293 29 23892644362977294 30'
$exploded = explode(" ", $data);
$chunked = array_chunk($exploded, 2);
$array = [];
foreach ($chunked as $row) {
$array[$row[0]] = $row[1];
}
and your result should be:
Array
(
[23892644362977289] => 28
[23892644362977293] => 29
[23892644362977294] => 30
)

Answer 4

This could be possible through a single regex.
(?:^(.{4})([^-]*)|\G)[\s-](\S+)\s+(\S+)
DEMO
$str = "0003customer-23892644362977289 28 23892644362977293 29 23892644362977294 30";
preg_match_all('~(?:^(.{4})([^-]*)|\G)[\s-](\S+)\s+(\S+)~', $str, $matches);
echo "Number : ".$matches[1][0]."\n";
echo "Table : ".$matches[2][0]."\n";
print_r($matches[3]);
print_r($matches[4]);