从另一个字符串搜索字符串并将这些字符串添加到数组[关闭]

Question

My string is:

$str = "a quick brown fox over the lazy dog... #fox #dog. hello everybody #lazy";

I want to get #fox, #dog and #lazy from that string and also every words that contains# and I want to add these string to an array like that:

 $array = array(
       [0]=>'#fox',
       [1]=>'#dog',
       [2]=>'#lazy',
   );

Anyone who can help me.. Please. Thanks a lot!

Answer 1

You could make use of this regular expression '/#(\w+)/'

<?php
$str = "a quick brown fox over the lazy dog... #fox #dog. hello everybody #lazy";
preg_match_all('/#(\w+)/', $str, $matches);
array_walk($matches[1],function (&$v){ $v='#'.$v;});
print_r($matches[1]);

OUTPUT :

Array
(
    [0] => #fox
    [1] => #dog
    [2] => #lazy
)