Question

尝试从一个数组中获取两个单词短语但我在单词之前或之后不断获得一个带有空格的单词短语。

$text = preg_replace(array('/\s{2,}/', '/[\t\n]/'), ' ', $text);
$textarray = explode(" ", $text);
array_filter($textarray);
$textCount = array_count_values($textarray);
arsort($textCount);
$twoWords = array();
for ($i = 0; $i<=count($textarray); ++$i) {
    if ($textarray[$i]<>"  ") {
        $twoWords[$i] = $textarray[$i]." ".$textarray[$i + 1];
    } else {
        $twoWords[$i] = "blah";
    }
}
foreach ($twoWordsCount as $tey => $val2) {
    if ($tey == null || $tey == "" || $tey == "\r\n"  || $tey == "\t"  || $tey == "\r"  || $tey == "\n" || $tey == "&nbsp;" || $tey == "  " || $tey == " ") {
        //do nothing
    } else {
        echo $val2."\n";
    }
}

由于某种原因，这只返回值像空白Hello或Test然后是空格，但我希望它返回hello test

Answer 1

不知道脚本的后半部分应该做什么，但第一部分可以简化为一行preg_split（）代码

<?php
foreach( array('hello world', ' hello world', 'hello world ', '  hello     world     ') as $input ) {
    $w = preg_split('!\s+!', $input, -1, PREG_SPLIT_NO_EMPTY);
    var_dump($w);
}

打印

array(2) {
  [0]=>
  string(5) "hello"
  [1]=>
  string(5) "world"
}
array(2) {
  [0]=>
  string(5) "hello"
  [1]=>
  string(5) "world"
}
array(2) {
  [0]=>
  string(5) "hello"
  [1]=>
  string(5) "world"
}
array(2) {
  [0]=>
  string(5) "hello"
  [1]=>
  string(5) "world"
}

编辑：也许你正在寻找像这样的东西

<?php
$input = getData();
$w = preg_split('![\s[:punct:]]+!', $input, -1, PREG_SPLIT_NO_EMPTY);
$w = array_count_values($w);
arsort($w);
$ci = new CachingIterator( new ArrayIterator( $w ) );
foreach( $ci as $next=>$cnt ) {
    printf("%s(%d) %s(%d)\n",
        $next, $cnt,
        $ci->getInnerIterator()->key(), $ci->getInnerIterator()->current()
    );
}


function getData() {
    return <<< eot
Mary had a little lamb,
whose fleece was white as snow.

And everywhere that Mary went,
the lamb was sure to go.

It followed her to school one day
which was against the rules.

It made the children laugh and play,
to see a lamb at school.

And so the teacher turned it out,
but still it lingered near,

And waited patiently about,
till Mary did appear.

"Why does the lamb love Mary so?"
the eager children cry.

"Why, Mary loves the lamb, you know."
 the teacher did reply.
eot;
}

打印

the(8) lamb(5)
lamb(5) Mary(5)
Mary(5) was(3)
was(3) And(3)
And(3) to(3)
to(3) It(2)
It(2) school(2)
school(2) so(2)
so(2) Why(2)
Why(2) did(2)
did(2) it(2)
it(2) teacher(2)
teacher(2) children(2)
children(2) a(2)
a(2) waited(1)
waited(1) patiently(1)
patiently(1) about(1)
about(1) till(1)
[...]
white(1) went(1)
went(1) (0)

请参阅http://docs.php.net/class.cachingiterator

Answer 2

这将提取前两个单词，无论有多少空格，制表符或换行符

$text = trim(preg_replace('/[\s\t\r\n]+/', ' ', $text));
$firstTwoWords = substr($text, 0, strpos($text, ' ', strpos($text, ' ') + 1));

php数组仍然获得空格和空值

2 个答案: