Need help building a regular expression?

Question

PHP

There is a string
string|name1,value1|name2,value2|name3,value3|...
I really want to make one regular expression so that I can pull out all the necessary values: string, name1, value1, name2, value2, name3, value3 and so on. I really want to make it myself, but I can't.
string - can be a more complex expression that will need to be parsed in the same regular expression.
UPD. An example would be an address like this: www.google.ru/?sclient=psy-ab&hl=ru&safe=off&sourc...
where string is www.google.ru/? and the rest of the parameters. The regular is needed so that it can be passed as an argument.

Answer 1

$a = "string|name1,value1|name2,value2|name3,value3|...";
preg_match_all("/([^|,]+)/",$a,$matches);
var_dump($matches);

Answer 2

preg_match_all("~([^|,]+)\|([^,]+)~","string|name1,value1|name2,value2|name3",$m);var_dump($m);

  [1]=>
  array(3) {
    [0]=>
    string(6) "string"
    [1]=>
    string(6) "value1"
    [2]=>
    string(6) "value2"
  }
  [2]=>
  array(3) {
    [0]=>
    string(5) "name1"
    [1]=>
    string(5) "name2"
    [2]=>
    string(5) "name3"
  }

Answer 3

Do you need a regular only to have less code? Maybe do without them?

<?php

$s = 'string|name1,value1|name2,value2|name3,value3';
$b = array();

foreach( explode('|', $s) AS $e ) {
  list($k, $v) = explode(',', $e);
  $b[$k] = $v;
}

?>

$b: Array
(
    [string] => 
    [name1] => value1
    [name2] => value2
    [name3] => value3
)

Only about “string” it is not entirely clear what you meant ... Can you give an example?

Answer 4

// Вот регулярка вашей мечты:
$pattern = '/^(?<prefix>\w+)|(?<names>\w+),(?<values>\w+)/i';
$value = 'string|name1,value1|name2,value2';
preg_match_all($pattern, $value, $matches);
var_dump($matches);

// Можно почистить лишние матчеры
array_walk($matches, function(&$item, $key) use (&$matches) {
   if (is_numeric($key)) {
      unset($matches[$key]);
      return;
   }
   foreach ($item as $key => $match) {
      if (empty($match)) {
         unset($item[$key]);
      }
   }
});
var_dump($matches);

Answer 5

Not sure if I understood the problem correctly. The wording is too confusing.
<?php
$string = 'string|name1,value1|name2,value2|name3,value3';
$regexp = '/[a-zA-Z0-9]+/';
preg_match_all($regexp,$string,$matches);
var_dump($matches);


Answer 6

What about word boundary - \b ?
ideone.com/w5cgt
<?
$str = 'string|name1,value1|name2,value2|name3,value3|';
preg_match_all('#\b(\w+)\b#', $str, $matches);
var_dump($matches);
?>
[0] => Array
(
[0] => string
[1] => name1
[2] => value1
[3] => name2
[4] => value2
[5] => name3
[6] => value3
)

Answer 7

(\w+)