如何删除 php 中字符串末尾附近的分配字符？

Question

$text_one = "Blue - Art-1011-No.1 [Pinpoint Light Blue]-78" ; 

我想删除字符串末尾附近显示的字符“ - ”

$regex = "/[.*?!@#$&-_ ]+$/";
$result = preg_replace($regex, "", $text_one);

$result =  Blue - Art-1011-No.1 [Pinpoint Light Blue

怎么了？ 虽然我想

$result = Blue - Art-1011-No.1 [Pinpoint Light Blue]

p/s：我不想使用位置，因为其他字符串可能是 -878、-999、-1234

Answer 1

$string = "Blue - Art-1011-No.1 [Pinpoint Light Blue]-78";
$needle = "-";
echo substr( $string, 0, strrpos( $string, $needle, 0 ) );

Answer 2

您可以使用 PHP strrpos() function：

$text_one = "Blue - Art-1011-No.1 [Pinpoint Light Blue]-78" ; 
$needle = "-";
$result =  substr( $text_one, 0, strrpos( $text_one, $needle, 0 ) );
echo $result;