我正在尝试在两个分隔符之间获取文本并将其保存到数组中。我写了这个函数,这个代码的问题是它删除了重复,所以
$this->getInnerSubstring('{2}{A}{A}{A}{X}','{', '}');
返回一个类似
的数组[0] =>2,
[1]=>A,
[2] =>X ,
但我想:
[0] =>2,
[1]=>A,
[2]=>A,
[3]=>A,
[4] =>X,
没有正则表达式模式是否有一个substr标志,让我保持重复?这里最好的方法是什么:
function getInnerSubstring($string,$start, $end){
$s = array();
do
{
$startpos = strpos($string, $start) + strlen($start);
$endpos = strpos($string, $end, $startpos);
$s[] = substr($string, $startpos, $endpos - $startpos);
//remove entire occurance from string:
$string = str_replace(substr($string, strpos($string, $start), strpos($string, $end) +strlen($end)), '', $string);
}
while (strpos($string, $start)!== false && strpos($string, $end)!== false);
return $s;
}
答案 0 :(得分:3)
使用preg_match_all()
:
$string = "{2}{A}{A}{A}{X}";
$ldelim = "{";
$rdelim = "}";
var_dump(getInnerSubstring($string, $ldelim, $rdelim));
function getInnerSubstring($string, $ldelim, $rdelim) {
$pattern = "/" . preg_quote($ldelim) . "(.*?)" . preg_quote($rdelim) . "/";
preg_match_all($pattern, $string, $matches);
return $matches[1];
}
输出:
array(5) {
[0]=>
string(1) "2"
[1]=>
string(1) "A"
[2]=>
string(1) "A"
[3]=>
string(1) "A"
[4]=>
string(1) "X"
}
另一种方法是使用preg_split()
:
var_dump(preg_split('({|})', $string, -1, PREG_SPLIT_NO_EMPTY));
您可以使用与上述相同的方式将其放入函数中。
答案 1 :(得分:2)
简单明了:
刚刚将所有{
和}
更改为{
并将其展开。
$str = "{2}{A2}{A}{A}{X}";
$str = array_filter(explode("{", str_replace(["{", "}"], ["", "{"], $str)));
print_r($str);
输出:
Array ( [0] => 2 [1] => A2 [2] => A [3] => A [4] => X )
为了能够识别您可以使用的空元素:
$str = "{2}{A2}{A}{A}{}{X}";
$elements = explode('}', str_replace("{", "", $str) . PHP_EOL));
array_pop($elements);
print_r($elements);
输出:
Array ( [0] => 2 [1] => A2 [2] => A [3] => A [4] => [5] => X )