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@ 2013-06-12T13:06:54Z

<?php
$input = '1 foo
2   ba_r
3  foo bar
4   fo-o';
preg_match_all( '/^(\d+)\s+(.*)$/m', $input, $matches, PREG_SET_ORDER);

$data = array();
foreach( $matches as $match) {
    list( , $num, $word) = $match;
    $data[] = array( $num, $word);
}
print_r( $data);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
preg_match_all: documentation ( source)

preferences:dark modelive preview

32.57 ms | 402 KiB | 5 Q