这是一个示例字符串:
$text = 'foo (20/50) bar () baz (11/30)';
我需要的输出是这样的:
$items = array(
array(
"title" => "foo",
"number" => 20
),
array(
"title" => "bar",
"number" => 0
)
array(
"title" => "baz",
"number" => 11
)
);
尝试
到目前为止,我一直在使用
$matches_title = array();
$matches_number = array();
preg_match_all('!([^\s]+)!',$text,$matches_title);
preg_match_all('!(?<=\()(\d+)(?=\/)!',$text,$matches_number);
然后遍历匹配项以捕获值.显然,当括号之一为空时,这将不起作用,因为两个数组的长度都不同.
我该如何解决这个问题?
解决方法:
$text = 'foo (20/50) bar () baz (11/30)';
preg_match_all('~([\w-]+)\h*\((\d*)(?=[/)])~', $text, $m);
$items = array();
foreach($m[1] as $i => $v) {
$n = $m[2][$i];
$items[] = array( "title" => $v, "number" => (empty($n) ? 0: $n) );
}
print_r($items);
输出:
Array
(
[0] => Array
(
[title] => foo
[number] => 20
)
[1] => Array
(
[title] => bar
[number] => 0
)
[2] => Array
(
[title] => baz
[number] => 11
)
)