获取之间的字符串 - 查找所有出现的 PHP

Question

I found this function 在两个文本字符串、html 或其他字符串之间查找数据。

如何更改它以便找到所有出现的事件？每次出现 $start [some-random-data] $end 之间的每个数据。我想要文档的所有 [一些随机数据]（它总是不同的数据）。

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
)
*/ 

Demo.

Answer 2

您可以使用正则表达式来做到这一点：

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

    return $matches[1];
}

Answer 3

我喜欢使用explode 来获取两个字符串之间的字符串。此函数也适用于多次出现。

function GetIn($str,$start,$end){
    $p1 = explode($start,$str);
    for($i=1;$i<count($p1);$i++){
        $p2 = explode($end,$p1[$i]);
        $p[] = $p2[0];
    }
    return $p;
}

Answer 4

我需要在特定的第一个和最后一个标签之间找到所有这些出现并以某种方式更改它们并取回更改的字符串。

所以我在函数之后添加了这个小代码到raina77ow方法中。

        $sample = '<start>One<end> aaa <start>TwoTwo<end> Three <start>Four<end> aaaaa <start>Five<end>';
        $sample_temp = getContents($sample, '<start>', '<end>');
        $i = 1;
        foreach($sample_temp as $value) {
            $value2 = $value.'-'.$i; //there you can change the variable
            $sample=str_replace('<start>'.$value.'<end>',$value2,$sample);
            $i = ++$i;
        }
        echo $sample;

现在输出样本已经删除了标签，并且它们之间的所有字符串都添加了这样的数字：

One-1 aaa TwoTwo-2 三 四-3 aaaaa 五-4

但是您可以对它们做任何其他事情。也许对某人有帮助。

Answer 5

这里有一些很好的解决方案，但是对于从 HTML 中提取部分代码并不完美，这是我现在的问题，因为我需要在压缩 HTML 之前从 HTML 中获取脚本块。所以在@raina77ow 原始解决方案的基础上，由@Cas Tuyn 扩展，我得到了这个：

$test_strings = [
    '0<p>a</p>1<p>b</p>2<p>c</p>3',
    '0<p>a</p>1<p>b</p>2<p>c</p>',
    '<p>a</p>1<p>b</p>2<p>c</p>3',
    '<p>a</p>1<p>b</p>2<p>c</p>',
    '<p></p>1<p>b'
];

/**
* Seperate a block of code by sub blocks. Example, removing all <script>...<script> tags from HTML kode
* 
* @param string $str, text block
* @param string $startDelimiter, string to match for start of block to be extracted
* @param string $endDelimiter, string to match for ending the block to be extracted
* @return array [all full blocks, whats left of string]
*/
function getDelimitedStrings($str, $startDelimiter, $endDelimiter) {
    $contents = array();
    $startDelimiterLength = strlen($startDelimiter);
    $endDelimiterLength = strlen($endDelimiter);
    $startFrom = $contentStart = $contentEnd = $outStart = $outEnd = 0;
    while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
        $contentStart += $startDelimiterLength;
        $contentEnd = strpos($str, $endDelimiter, $contentStart);
        $outEnd = $contentStart - 1;
        if (false === $contentEnd) {
            break;
        }
        $contents['in'][] = substr($str, ($contentStart-$startDelimiterLength), ($contentEnd + ($startDelimiterLength*2) +1) - $contentStart);
        if( $outStart ){
            $contents['out'][] = substr($str, ($outStart+$startDelimiterLength+1), $outEnd - $outStart - ($startDelimiterLength*2));
        } else if( ($outEnd - $outStart - ($startDelimiterLength-1)) > 0 ){
            $contents['out'][] = substr($str, $outStart, $outEnd - $outStart - ($startDelimiterLength-1));
        }
        $startFrom = $contentEnd + $endDelimiterLength;
        $startFrom = $contentEnd;
        $outStart = $startFrom;
    }
    $total_length = strlen($str);
    $current_position = $outStart + $startDelimiterLength + 1;
    if( $current_position < $total_length )
        $contents['out'][] = substr($str, $current_position);

    return $contents;
}

foreach($test_strings AS $string){
    var_dump( getDelimitedStrings($string, '<p>', '</p>') );
}

这将提取所有

wlements 与可能的 innerHTML 以及，给出以下结果：

array (size=2)
'in' => array (size=3)
    0 => string '<p>a</p>' (length=8)
    1 => string '<p>b</p>' (length=8)
    2 => string '<p>c</p>' (length=8)
'out' => array (size=4)
    0 => string '0' (length=1)
    1 => string '1' (length=1)
    2 => string '2' (length=1)
    3 => string '3' (length=1)

array (size=2)
'in' => array (size=3)
    0 => string '<p>a</p>' (length=8)
    1 => string '<p>b</p>' (length=8)
    2 => string '<p>c</p>' (length=8)
'out' => array (size=3)
    0 => string '0' (length=1)
    1 => string '1' (length=1)
    2 => string '2' (length=1)

array (size=2)
'in' => array (size=3)
    0 => string '<p>a</p>' (length=8)
    1 => string '<p>b</p>' (length=8)
    2 => string '<p>c</p>' (length=8)
'out' => array (size=3)
    0 => string '1' (length=1)
    1 => string '2' (length=1)
    2 => string '3' (length=1)

array (size=2)
'in' => array (size=3)
    0 => string '<p>a</p>' (length=8)
    1 => string '<p>b</p>' (length=8)
    2 => string '<p>c</p>' (length=8)
'out' => array (size=2)
    0 => string '1' (length=1)
    1 => string '2' (length=1)

array (size=2)
'in' => array (size=1)
    0 => string '<p></p>' (length=7)
'out' => array (size=1)
    0 => string '1<p>b' (length=5)

您可以在此处查看演示：3v4l.org/TQLmn

Answer 6

我还需要模式之外的文本。所以我把上面的raina77ow的答案改了一点：

function get_delimited_strings($str, $startDelimiter, $endDelimiter) {
    $contents = array();
    $startDelimiterLength = strlen($startDelimiter);
    $endDelimiterLength = strlen($endDelimiter);
    $startFrom = $contentStart = $contentEnd = $outStart = $outEnd = 0;
    while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
        $contentStart += $startDelimiterLength;
        $contentEnd = strpos($str, $endDelimiter, $contentStart);
        $outEnd = $contentStart - 1;
        if (false === $contentEnd) {
            break;
        }
        $contents['in'][] = substr($str, $contentStart, $contentEnd - $contentStart);
        $contents['out'][] = substr($str, $outStart, $outEnd - $outStart);
        $startFrom = $contentEnd + $endDelimiterLength;
        $outStart = $startFrom;
    }
    $contents['out'][] = substr($str, $outStart, $contentEnd - $outStart);
    return $contents;
}

用法：

    $str = "Bore layer thickness [2 mm] instead of [1,25 mm] with [0,1 mm] deviation.";
    $cas = get_delimited_strings($str, "[", "]");

给予：

array(2) { 
    ["in"]=> array(3) { 
        [0]=> string(4) "2 mm" 
        [1]=> string(7) "1,25 mm" 
        [2]=> string(6) "0,1 mm" 
    } 
    ["out"]=> array(4) { 
        [0]=> string(21) "Bore layer thickness " 
        [1]=> string(12) " instead of " 
        [2]=> string(6) " with " 
        [3]=> string(10) " deviation" 
    } 
}