获取字符串 - 查找所有出现的PHP

Question

我发现这个函数可以在两个文本字符串,html或其他内容之间获取数据.

如何更改以便找到所有事件？每次出现$ start [some-random-data] $ end之间的每个数据.我想要文档的所有[某些随机数据](它将始终是不同的数据).

function getStringBetween($string, $start, $end) {
    $string = " ".$string;
    $ini = strpos($string,$start);
    if ($ini == 0) return "";
    $ini += strlen($start);
    $len = strpos($string,$end,$ini) - $ini;
    return substr($string,$ini,$len);
}

Answer 1

一种可能的方法:

function getContents($str, $startDelimiter, $endDelimiter) {
  $contents = array();
  $startDelimiterLength = strlen($startDelimiter);
  $endDelimiterLength = strlen($endDelimiter);
  $startFrom = $contentStart = $contentEnd = 0;
  while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
    $contentStart += $startDelimiterLength;
    $contentEnd = strpos($str, $endDelimiter, $contentStart);
    if (false === $contentEnd) {
      break;
    }
    $contents[] = substr($str, $contentStart, $contentEnd - $contentStart);
    $startFrom = $contentEnd + $endDelimiterLength;
  }

  return $contents;
}

用法:

$sample = '<start>One<end>aaa<start>TwoTwo<end>Three<start>Four<end><start>Five<end>';
print_r( getContents($sample, '<start>', '<end>') );
/*
Array
(
    [0] => One
    [1] => TwoTwo
    [2] => Four
    [3] => Five
)
*/ 

演示.

Answer 2

您可以使用正则表达式执行此操作:

function getStringsBetween($string, $start, $end)
{
    $pattern = sprintf(
        '/%s(.*?)%s/',
        preg_quote($start),
        preg_quote($end)
    );
    preg_match_all($pattern, $string, $matches);

    return $matches[1];
}