Split a string while keeping delimiters and string outside

问题

I'm trying to do something that must be really simple, but I'm fairly new to PHP and I'm struggling with this one. What I want is to split a string containing 0, 1 or more delimiters (braces), while keeping the delimiters AND the string between AND the string outside.

ex: 'Hello {F}{N}, how are you?' would output :

Array ( [0] => Hello 
        [1] => {F}
        [2] => {N} 
        [3] => , how are you? ) 

Here's my code so far:

$value = 'Hello {F}{N}, how are you?';
$array= preg_split('/[\{\}]/', $value,-1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
print_r($array);

which outputs (missing braces) :

Array ( [0] => Hello 
        [1] => F
        [2] => N 
        [3] => , how are you? )

I also tried :

preg_match_all('/\{[^}]+\}/', $myValue, $array);

Which outputs (braces are there, but the text outside is flushed) :

Array ( [0] => {F} 
        [1] => {N} ) 

I'm pretty sure I'm on the good track with preg_split, but with the wrong regex. Can anyone help me with this? Or tell me if I'm way off?

回答1:

You aren't capturing the delimiters. Add them to a capturing group:

/(\{.*?\})/

回答2:

You need parentheses around the part of the expression to be captured:

preg_split('/(\{[^}]+\})/', $myValue, -1, PREG_SPLIT_DELIM_CAPTURE);

See the documentation for preg_split().

来源：https://stackoverflow.com/questions/16006590/split-a-string-while-keeping-delimiters-and-string-outside