PHP explode() not work with “ - ” character

问题

I want to substring the text, ex. "Hello - How are you?" by using this code

$text= "Hello - How are you?";
$strings = explode(' - ',$text);
echo $strings[0]; // Hello
echo $strings[1]; // How are you

it will not work, because of ' - '.

If i change to:

$text= "Hello-How are you?";
$strings = explode('-',$text);
echo $strings[0]; // Hello
echo $strings[1]; // How are you

it's ok.

Can someone help me? Thank you.

回答1:

I had the same problem, after an hour of investigating, turns out that texts copied from Microsoft Word have such a problem, word chooses to convert the minus character ( - ) to en dash ( – ) here you can see them side by side to see the difference: -–

I don't know why word does that, but we are used to see such annoying things done by word and you should never let anyone copy a text from word to you application!

To make you code work in these conditions you must first replace these odd characters:

$text= "Hello-How are you?";
$strings = str_replace('–', '-', $text);
$strings = explode('-',$text);
echo $strings[0]; // Hello
echo $strings[1]; // How are you

回答2:

I find out another way:

$title= filter_var($title, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
$title= str_replace('&#8211;', '-', $title);
$size = explode('-', $title);

Anything else works for me

回答3:

Chances are, your "spaces" are not real spaces but rather tabs or similar, and the hypen could be one different from the standard one, for example — or – instead of -.

You could then try the following:

$strings = preg_split('/\s[—–-]\s/', $text);

to properly split that string.

来源：https://stackoverflow.com/questions/18688287/php-explode-not-work-with-character

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