我正在解析文本但是当空格丢失时我无法获得一块(这是正常的)
修改:我在自由文本中添加了冒号
编辑好吧,这是一种可以写入键值对的任意文本格式。丢弃元素[0],数组上的其余元素产生一系列键值。它接受多行值。
这是测试用例文本:
:part1 only one \s removed:OK
:part2 :text :with
new lines
on it
:noSpaceAfterThis
:thisShoudBeAStandAlongText but: here there are more text
:part4 :even more text
这就是我想要的:
Array
(
[0] =>
[1] => part1
[2] => only one \s removed:OK
[3] => part2
[4] => :text :with
new lines
on it
[5] => noSpaceAfterThis
[6] =>
[7] => thisShoudBeAStandAlongText
[8] => but: here there are more text
[9] => part4
[10] => :even more text
)
这就是我得到的:
Array
(
[0] =>
[1] => part1
[2] => only one \s removed:OK
[3] => part2
[4] => :text :with
new lines
on it
[5] => noSpaceAfterThis
[6] => :thisShoudBeAStandAlongText but: here there are more text
[7] => part4
[8] => :even more text
)
这是我的测试代码:
<?php
$text = '
:part1 only one \s removed:OK
:part2 :text :with
new lines
on it
:noSpaceAfterThis
:thisShoudBeAStandAlongText but: here there are more text
:part4 :even more text';
echo '<pre>';
// my effort so far:
$ret = preg_split('|\r?\n:([\w\d]+)(?:\r?\s)?|i', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
print_r($ret);
// nor this one:
$ret = preg_split('|\r?\n:([\w\d]+)\r?\s?|i', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
print_r($ret);
// for debuging, an extra capturing group
$ret = preg_split('|\r?\n:([\w\d]+)(\r?\s)?|i', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
var_dump($ret);
答案 0 :(得分:3)
使用preg_match_all的另一种方法:
$pattern = '~(?<=^:|\n:)\S++|(?<=\s)(?:[^:]+?|(?<!\n):)+?(?= *+(?>\n:|$))~';
preg_match_all($pattern, $text, $matches);
echo '<pre>' . print_r($matches[0], true);
模式细节:
# capture all the first word at line begining preceded by a colon #
(?<=^:|\n:) # lookbehind, preceded by the begining of the string
# and a colon or a newline and a colon
\S++ # all that is not a space
# capture all the content until the next line with : at first position #
(?<=\s) # lookbehind, preceded by a space
(?: # open a non capturing group
[^:]+? # all character that is not a colon, one or more times (lazy)
| # OR
(?<!^|\n): # negative lookbehind, a colon not preceded by a newline
# or the begining of the string
)+? # close the non capturing group,
#repeat one or more times (lazy)
(?= *+(?>\n:|$)) # lookahead, followed by spaces (zero or more) and a newline
# with colon at first position or the end of the string
这里的优点是避免空洞结果。
或使用preg_split:
$res = preg_split('~(?:\s*\n|^):(\S++)(?: )?~', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
解释:
目标是在两种情况下分割文本:
:
时,:
因此,在一条线的开始处有两个分裂点:word
。
必须删除:
和后面的空格,但必须保留该单词。这就是我使用PREG_SPLIT_DELIM_CAPTURE来保持这个词的原因。
模式细节:
(?: # non capturing group (all inside will be removed)
\s*\n # trim the spaces of the precedent line and the newline
| # OR
^ # it is the begining of the string
) # end of the non capturing group
: # remove the first character when it is a :
(\S++) # keep the first word with DELIM_CAPTURE
(?: )? # remove the first space if present