我有兴趣在function delete_all_between($char1, $char2, $string)
给定的 $string 中搜索 $char1 和 $char2 ，如果找到了，则从这两个字符之间的子字符串中清除 $string，包括$char1 和 $char2 本身。
例子：
$string = 'Some valid and <script>some invalid</script> text!';
delete_all_between('<script>', '</script>', $string);
现在， $string 应该只包含
'Some valid and text'; //note two spaces between 'and text'
有人有快速解决方案吗？
<?php
$string = 'Some valid and <script>some invalid</script> text!';
$out = delete_all_between('<script>', '</script>', $string);
print($out);
function delete_all_between($beginning, $end, $string) {
$beginningPos = strpos($string, $beginning);
$endPos = strpos($string, $end);
if ($beginningPos === false || $endPos === false) {
return $string;
}
$textToDelete = substr($string, $beginningPos, ($endPos + strlen($end)) - $beginningPos);
return delete_all_between($beginning, $end, str_replace($textToDelete, '', $string)); // recursion to ensure all occurrences are replaced
}
这是一个单线：
preg_replace('/START[\s\S]+?END/', '', $string);
替换START和END:) 学分转到另一个 SO 线程！
我觉得substr()工作太慢了。最好的方法是：
return substr($string, 0, $beginningPos) .
substr($string, $endPos + strlen($end));
在我的情况下，第一个版本有问题，这是我更正的版本（如果 $end 字符串也出现在 $beginning 字符串之前）
<?php
$string = 'Some </script> valid and <script>some invalid</script> text!';
$out = delete_all_between('<script>', '</script>', $string);
print($out);
function delete_all_between($beginning, $end, $string) {
$beginningPos = strpos($string, $beginning);
$tmpstring = substr($string, $beginningPos);
$endPos = strpos($tmpstring, $end);
if ($beginningPos === false || $endPos === false) {
return $string;
}
$textToDelete = substr($string, $beginningPos, ($endPos + strlen($end)) );
return delete_all_between($beginning, $end, str_replace($textToDelete, '', $string)); // recursion to ensure all occurrences are replaced
}
实际上，我一直在寻找一个函数，它为我提供了简单而稳定的解决方案来获取 TWIG 模板的所有变量。由于许多原因，建议的正则表达式效果不佳，所以我决定只删除标签之间的所有内容，而不是计算标签^_^。
/**
* deletes ALL the string contents between all the designated characters
* @param $start - pattern start
* @param $end - pattern end
* @param $string - input string,
* @return mixed - string
*/
function auxDeleteAllBetween($start, $end, $string) {
// it helps to assembte comma dilimited strings
$string = strtr($start. $string . $end, array($start => ','.$start, $end => chr(2)));
$startPos = 0;
$endPos = strlen($string);
while( $startPos !== false && $endPos !== false){
$startPos = strpos($string, $start);
$endPos = strpos($string, $end);
if ($startPos === false || $endPos === false) {
$run = false;
return $string;
}
$textToDelete = substr($string, $startPos, ($endPos + strlen($end)) - $startPos);
$string = str_replace($textToDelete, '', $string);
}
return $string;
}
/**
* This function is intended to replace
* //preg_match_all('/\{\%\s*([^\%\}]*)\s*\%\}|\{\{\s*([^\}\}]*)\s*\}\}/i', $this->_tplSubj, $matchesSubj);
* which did not give intended results for some reason.
*
* @param $inputTpl
* @return array
*/
private function auxGetAllTags($inputTpl){
$inputTpl = strtr($inputTpl, array('}}' => ','.chr(1), '{{' => chr(2)));
return explode(',',$this->auxDeleteAllBetween(chr(1),chr(2),$inputTpl));
}
$template = '<style>
td{border-bottom:1px solid #eee;}</style>
<p>Dear {{jedi}},<br>New {{padawan}} is waiting for your approval: </p>
<table border="0">
<tbody><tr><td><strong>Register as</strong></td><td>{{register_as}}, user-{{level}}</td></tr>
<tr><td><strong>Name</strong></td><td>{{first_name}} {{last_name}}</td></tr>...';
print_r($this->auxGetAllTags($template));
我想删除 php 中的标签，因为我想在将 html 解析为 DOMDocument 之前删除未使用的标签。
这是我使用的代码。光标在开始时为 0。它只是用于程序中的递归。
function delete_all_betweenV2($cursor, $beginning, $end, $string, $retainSelf) {
echo '>>>> Start '.'<br>';
$beginningPos = strpos($string, $beginning, $cursor);
$endPos = strpos($string, $end, $beginningPos);
if ($beginningPos === false || $endPos === false) {
echo '>>>> End '.'<br>';
return $string;
}
if($endPos >= strlen($string)) {
echo '>>>> End '.'<br>';
return $string;
}
$lenOfBeginning = strlen($beginning);
$lenOfEnd = strlen($end);
$result = $string;
if($retainSelf) {
echo 'b4 input String: '.$string.'<br>';
echo 'b4 cursor = : '.$cursor. '<br>';
echo 'b4 string: '.$string. '<br>';
echo 'b4 beginning Pos: '.$beginningPos.'<br>';
echo 'b4 end Pos: '.$endPos.'<br>';
echo 'b4 length to be cut is: '.(($endPos - $lenOfEnd) - $beginningPos).'<br>';
if($cursor > 0) {
echo 'cursor is greater than 0'.'<br>';
$textToDelete = substr($string, $beginningPos + $lenOfBeginning, ($endPos - $lenOfEnd) - $beginningPos);
} else {
echo 'cursor is NOT greater than 0'.'<br>';
$textToDelete = substr($string, $beginningPos + $lenOfBeginning, ($endPos - $lenOfEnd) - $beginningPos);
}
echo 'TextToDelete:'.$textToDelete.'<br>';
//$stringStart = substr($string, 0, $beginningPos + $lenOfBeginning);
//echo $stringStart.'<br>';
//$stringTail = substr($string, $endPos, strlen($string));
//echo $stringTail.'<br>';
$result = str_replace($textToDelete, '', $string);
$cursor = $beginningPos + $lenOfBeginning; // just make sure that the cursor search next character/word
echo 'After cursor = : '.$cursor. '<br>';
echo 'After result: '.$result. '<br>';
echo 'After len of result: '.strlen($result). '<br>';
} else {
//$stringStart = substr($string, 0, $beginningPos);
//echo $stringStart.'<br>';
//$stringTail = substr($string, $endPos + $lenOfEnd, strlen($string));
//echo $stringTail.'<br>';
$cursor = 0;
$textToDelete = substr($string, $beginningPos, ($endPos + $lenOfEnd) - $beginningPos);
echo 'TextToDelete:'.$textToDelete.'<br>';
$result = str_replace($textToDelete, '', $string);
}
echo '>>>> End '.'<br>';
return delete_all_betweenV2($cursor, $beginning, $end, $result, $retainSelf);
}
作为对 AndreaTS 的 delete_all_between() 的修订，但为了处理标签属性（例如<script type='abc'>）和不区分大小写，我有这个......
function delete_all_between(string $html, string $tag) {
$startTag="<$tag ";
$endTag="</$tag>";
$html =str_ireplace("<$tag>", "<$tag >", $html);
$startPos = stripos($html, $startTag);
$tmpStr = substr($html, $startPos);
$endPos = stripos($tmpStr, $endTag);
if ($startPos === false || $endPos === false) {
return $html;
}
$textToDelete = substr($html, $startPos, ($endPos + strlen($startTag))+1 );
return delete_all_between(str_replace($textToDelete, '', $html), $tag); // recursion to ensure all occurrences are replaced
}
请参阅http://sandbox.onlinephpfunctions.com/code/1b984b61cfd1c9cea4c6eef1d765ff387a4cd9e9了解运行此的 php 沙箱。
您可以使用双 str_replace()
$q = str_replace('<script>', '', $string);
$p = str_replace('some invalid', '', $q);
echo $p;