我需要一个函数来返回两个单词(或两个字符)之间的子串。
我想知道是否有一个PHP功能实现了这一点。我不想考虑正则表达式(好吧,我可以做一个,但真的不认为这是最好的方式)。考虑strpos
和substr
函数。
这是一个例子:
$string = "foo I wanna a cake foo";
我们称之为功能:$substring = getInnerSubstring($string,"foo");
它回归:“我想要一块蛋糕。”
提前致谢。
更新
好吧,到现在为止,我只能在一个字符串中得到一个字符串只有两个字,你是否允许让我走得更远,并问我是否可以扩展使用getInnerSubstring($str,$delim)
以获得介于两者之间的任何字符串delim value,例如:
$string =" foo I like php foo, but foo I also like asp foo, foo I feel hero foo";
我得到一个像{"I like php", "I also like asp", "I feel hero"}
这样的数组。
答案 0 :(得分:265)
如果字符串不同(即:[foo]& [/ foo]),请查看Justin Cook的this post。 我复制下面的代码:
function get_string_between($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);
}
$fullstring = 'this is my [tag]dog[/tag]';
$parsed = get_string_between($fullstring, '[tag]', '[/tag]');
echo $parsed; // (result = dog)
答案 1 :(得分:53)
正则表达式是要走的路:
$str = 'before-str-after';
if (preg_match('/before-(.*?)-after/', $str, $match) == 1) {
echo $match[1];
}
答案 2 :(得分:22)
function getBetween($string, $start = "", $end = ""){
if (strpos($string, $start)) { // required if $start not exist in $string
$startCharCount = strpos($string, $start) + strlen($start);
$firstSubStr = substr($string, $startCharCount, strlen($string));
$endCharCount = strpos($firstSubStr, $end);
if ($endCharCount == 0) {
$endCharCount = strlen($firstSubStr);
}
return substr($firstSubStr, 0, $endCharCount);
} else {
return '';
}
}
样品使用:
echo getBetween("a","c","abc"); // returns: 'b'
echo getBetween("h","o","hello"); // returns: 'ell'
echo getBetween("a","r","World"); // returns: ''
答案 3 :(得分:13)
function getInnerSubstring($string,$delim){
// "foo a foo" becomes: array(""," a ","")
$string = explode($delim, $string, 3); // also, we only need 2 items at most
// we check whether the 2nd is set and return it, otherwise we return an empty string
return isset($string[1]) ? $string[1] : '';
}
使用示例:
var_dump(getInnerSubstring('foo Hello world foo','foo'));
// prints: string(13) " Hello world "
如果要删除周围的空格,请使用trim
。例如:
var_dump(trim(getInnerSubstring('foo Hello world foo','foo')));
// prints: string(11) "Hello world"
答案 4 :(得分:12)
function getInbetweenStrings($start, $end, $str){
$matches = array();
$regex = "/$start([a-zA-Z0-9_]*)$end/";
preg_match_all($regex, $str, $matches);
return $matches[1];
}
例如,您希望在以下示例中@@之间的字符串(键)数组,其中'/'不介于
之间
$str = "C://@@ad_custom_attr1@@/@@upn@@/@@samaccountname@@";
$str_arr = getInbetweenStrings('@@', '@@', $str);
print_r($str_arr);
答案 5 :(得分:8)
我喜欢正则表达式解决方案,但其他人都不适合我。
如果您知道只有1个结果,您可以使用以下内容:
m3.xlarge | CORES : 4(1) | RAM : 15 (3.5) | HDD : 80 GB | Nodes : 3 Nodes
spark-submit --class <YourClassFollowedByPackage> --master yarn-cluster --num-executors 2 --driver-memory 8g --executor-memory 8g --executor-cores 1 <Your Jar with Full Path> <Jar Args>
将BEFORE和AFTER更改为所需的分隔符。
另请注意,如果没有匹配,此函数将返回整个字符串。
此解决方案是多线的,但您可以根据需要使用修改器。
答案 6 :(得分:6)
如果您使用foo
作为分隔符,请查看explode()
答案 7 :(得分:5)
<?php
function getBetween($content,$start,$end){
$r = explode($start, $content);
if (isset($r[1])){
$r = explode($end, $r[1]);
return $r[0];
}
return '';
}
?>
示例:
<?php
$content = "Try to find the guy in the middle with this function!";
$start = "Try to find ";
$end = " with this function!";
$output = getBetween($content,$start,$end);
echo $output;
?>
这将返回“中间人”。
答案 8 :(得分:4)
两次使用strstr php函数。
$value = "This is a great day to be alive";
$value = strstr($value, "is"); //gets all text from needle on
$value = strstr($value, "be", true); //gets all text before needle
echo $value;
输出:
"is a great day to"
答案 9 :(得分:3)
如果您有一个字符串的多次重复,并且您有不同的[start]和[\ end]模式。 这是一个输出数组的函数。
function get_string_between($string, $start, $end){
$split_string = explode($end,$string);
foreach($split_string as $data) {
$str_pos = strpos($data,$start);
$last_pos = strlen($data);
$capture_len = $last_pos - $str_pos;
$return[] = substr($data,$str_pos+1,$capture_len);
}
return $return;
}
答案 10 :(得分:3)
这是一个功能
function getInnerSubstring($string, $boundstring, $trimit=false) {
$res = false;
$bstart = strpos($string, $boundstring);
if ($bstart >= 0) {
$bend = strrpos($string, $boundstring);
if ($bend >= 0 && $bend > $bstart)
$res = substr($string, $bstart+strlen($boundstring), $bend-$bstart-strlen($boundstring));
}
return $trimit ? trim($res) : $res;
}
像
一样使用它$string = "foo I wanna a cake foo";
$substring = getInnerSubstring($string, "foo");
echo $substring;
输出(请注意,如果存在,则返回前面和字符串处的空格)
我想要一块蛋糕
如果你想修剪结果使用功能,如
$substring = getInnerSubstring($string, "foo", true);
结果:如果在$boundstring
中找不到$string
或$boundstring
只存在一次,则此函数将返回 false $string
,否则它会在$boundstring
中$string
的第一次和最后一次出现之间返回子字符串。
<小时/> <强>参考强>
答案 11 :(得分:2)
不是php专业版。但我最近也碰到了这堵墙,这就是我想出来的。
function tag_contents($string, $tag_open, $tag_close){
foreach (explode($tag_open, $string) as $key => $value) {
if(strpos($value, $tag_close) !== FALSE){
$result[] = substr($value, 0, strpos($value, $tag_close));;
}
}
return $result;
}
$string = "i love cute animals, like [animal]cat[/animal],
[animal]dog[/animal] and [animal]panda[/animal]!!!";
echo "<pre>";
print_r(tag_contents($string , "[animal]" , "[/animal]"));
echo "</pre>";
//result
Array
(
[0] => cat
[1] => dog
[2] => panda
)
答案 12 :(得分:1)
我用
if (count(explode("<TAG>", $input))>1){
$content = explode("</TAG>",explode("<TAG>", $input)[1])[0];
}else{
$content = "";
}
Subtitue&lt; TAG&gt;无论你想要什么分隔符。
答案 13 :(得分:1)
来自GarciaWebDev和Henry Wang的一些改进代码。如果给出空$ start或$ end,则函数返回$ string的开头或结尾的值。如果我们想要包含搜索结果,还可以使用包含选项:
function get_string_between ($string, $start, $end, $inclusive = false){
$string = " ".$string;
if ($start == "") { $ini = 0; }
else { $ini = strpos($string, $start); }
if ($end == "") { $len = strlen($string); }
else { $len = strpos($string, $end, $ini) - $ini;}
if (!$inclusive) { $ini += strlen($start); }
else { $len += strlen($end); }
return substr($string, $ini, $len);
}
答案 14 :(得分:1)
这是我正在使用的功能。我将一个函数中的两个答案合并为单个或多个分隔符。
function getStringBetweenDelimiters($p_string, $p_from, $p_to, $p_multiple=false){
//checking for valid main string
if (strlen($p_string) > 0) {
//checking for multiple strings
if ($p_multiple) {
// getting list of results by end delimiter
$result_list = explode($p_to, $p_string);
//looping through result list array
foreach ( $result_list AS $rlkey => $rlrow) {
// getting result start position
$result_start_pos = strpos($rlrow, $p_from);
// calculating result length
$result_len = strlen($rlrow) - $result_start_pos;
// return only valid rows
if ($result_start_pos > 0) {
// cleanying result string + removing $p_from text from result
$result[] = substr($rlrow, $result_start_pos + strlen($p_from), $result_len);
}// end if
} // end foreach
// if single string
} else {
// result start point + removing $p_from text from result
$result_start_pos = strpos($p_string, $p_from) + strlen($p_from);
// lenght of result string
$result_length = strpos($p_string, $p_to, $result_start_pos);
// cleaning result string
$result = substr($p_string, $result_start_pos+1, $result_length );
} // end if else
// if empty main string
} else {
$result = false;
} // end if else
return $result;
} // end func. get string between
简单使用(返回两个):
$result = getStringBetweenDelimiters(" one two three ", 'one', 'three');
将表中的每一行都放到结果数组中:
$result = getStringBetweenDelimiters($table, '<tr>', '</tr>', true);
答案 15 :(得分:1)
Alejandro's answer的改进。您可以将$start
或$end
参数保留为空,它将使用字符串的开头或结尾。
echo get_string_between("Hello my name is bob", "my", ""); //output: " name is bob"
private function get_string_between($string, $start, $end){ // Get
if($start != ''){ //If $start is empty, use start of the string
$string = ' ' . $string;
$ini = strpos($string, $start);
if ($ini == 0) return '';
$ini += strlen($start);
}
else{
$ini = 0;
}
if ($end == '') { //If $end is blank, use end of string
return substr($string, $ini);
}
else{
$len = strpos($string, $end, $ini) - $ini; //Work out length of string
return substr($string, $ini, $len);
}
}
答案 16 :(得分:1)
使用:
<?php
$str = "...server daemon started with pid=6849 (parent=6848).";
$from = "pid=";
$to = "(";
echo getStringBetween($str,$from,$to);
function getStringBetween($str,$from,$to)
{
$sub = substr($str, strpos($str,$from)+strlen($from),strlen($str));
return substr($sub,0,strpos($sub,$to));
}
?>
答案 17 :(得分:1)
我必须在Julius Tilvikas的帖子中添加一些东西。我寻找他在帖子中描述的解决方案。但我认为有一个错误。我没有得到两个字符串之间的字符串,我也得到更多的解决方案,因为我必须减去start-string的长度。当这样做时,我真的得到两个字符串之间的字符串。
以下是我对其解决方案的更改:
function get_string_between ($string, $start, $end, $inclusive = false){
$string = " ".$string;
if ($start == "") { $ini = 0; }
else { $ini = strpos($string, $start); }
if ($end == "") { $len = strlen($string); }
else { $len = strpos($string, $end, $ini) - $ini - strlen($start);}
if (!$inclusive) { $ini += strlen($start); }
else { $len += strlen($end); }
return substr($string, $ini, $len);
}
格尔茨
V
答案 18 :(得分:1)
试试这个,它为我工作,在测试字之间获取数据。
$str = "Xdata test HD01 test 1data";
$result = explode('test',$str);
print_r($result);
echo $result[1];
答案 19 :(得分:1)
在PHP的strpos
样式中,如果找不到开始标记false
或结束标记sm
,则会返回em
。
此结果(false
)与空字符串的不同,如果开始和结束标记之间没有任何内容,则会获得该字符串。
function between( $str, $sm, $em )
{
$s = strpos( $str, $sm );
if( $s === false ) return false;
$s += strlen( $sm );
$e = strpos( $str, $em, $s );
if( $e === false ) return false;
return substr( $str, $s, $e - $s );
}
该功能仅返回第一场比赛。
很明显但值得一提的是,该功能首先会查找sm
,然后查找em
。
这意味着如果必须首先搜索em
,然后必须向后解析字符串以搜索sm
,则可能无法获得所需的结果/行为。
答案 20 :(得分:0)
这里的绝大多数答案都无法回答编辑过的部分,我想它们是以前添加的。正如一个答案所提到的,可以使用正则表达式来完成。我有不同的方法。
此函数搜索$ string并找到$ strong和$ start字符串之间的第一个字符串,从$ offset位置开始。然后,它更新$ offset位置以指向结果的开始。如果$ includeDelimiters为true,则在结果中包括定界符。
如果未找到$ start或$ end字符串,则返回null。如果$ string,$ start或$ end为空字符串,则它还会返回null。
function str_between(string $string, string $start, string $end, bool $includeDelimiters = false, int &$offset = 0): ?string
{
if ($string === '' || $start === '' || $end === '') return null;
$startLength = strlen($start);
$endLength = strlen($end);
$startPos = strpos($string, $start, $offset);
if ($startPos === false) return null;
$endPos = strpos($string, $end, $startPos + $startLength);
if ($endPos === false) return null;
$length = $endPos - $startPos + ($includeDelimiters ? $endLength : -$startLength);
if (!$length) return '';
$offset = $startPos + ($includeDelimiters ? 0 : $startLength);
$result = substr($string, $offset, $length);
return ($result !== false ? $result : null);
}
以下函数查找两个字符串之间的所有字符串(无重叠)。它需要上一个函数,并且参数相同。执行后,$ offset指向最后找到的结果字符串的开头。
function str_between_all(string $string, string $start, string $end, bool $includeDelimiters = false, int &$offset = 0): ?array
{
$strings = [];
$length = strlen($string);
while ($offset < $length)
{
$found = str_between($string, $start, $end, $includeDelimiters, $offset);
if ($found === null) break;
$strings[] = $found;
$offset += strlen($includeDelimiters ? $found : $start . $found . $end); // move offset to the end of the newfound string
}
return $strings;
}
示例:
str_between_all('foo 1 bar 2 foo 3 bar', 'foo', 'bar')
给出[' 1 ', ' 3 ']
。
str_between_all('foo 1 bar 2', 'foo', 'bar')
给出[' 1 ']
。
str_between_all('foo 1 foo 2 foo 3 foo', 'foo', 'foo')
给出[' 1 ', ' 3 ']
。
str_between_all('foo 1 bar', 'foo', 'foo')
给出[]
。
答案 21 :(得分:0)
亚历杭德罗·加西亚·伊格莱西亚斯写的经编辑的版本。
这使您可以根据发现结果的次数来选择要获取的字符串的特定位置。
function get_string_between_pos($string, $start, $end, $pos){
$cPos = 0;
$ini = 0;
$result = '';
for($i = 0; $i < $pos; $i++){
$ini = strpos($string, $start, $cPos);
if ($ini == 0) return '';
$ini += strlen($start);
$len = strpos($string, $end, $ini) - $ini;
$result = substr($string, $ini, $len);
$cPos = $ini + $len;
}
return $result;
}
用法:
$text = 'string has start test 1 end and start test 2 end and start test 3 end to print';
//get $result = "test 1"
$result = $this->get_string_between_pos($text, 'start', 'end', 1);
//get $result = "test 2"
$result = $this->get_string_between_pos($text, 'start', 'end', 2);
//get $result = "test 3"
$result = $this->get_string_between_pos($text, 'start', 'end', 3);
strpos还有一个附加的可选输入,可以从特定点开始搜索。因此我将先前的位置存储在$ cPos中,以便再次进行for循环检查时,它从停止的位置开始。
答案 22 :(得分:0)
function img($n,$str){
$first=$n."tag/";
$n+=1;
$last=$n."tag/";
$frm = stripos($str,$first);
$to = stripos($str,$last);
echo $frm."<br>";
echo $to."<br>";
$to=($to=="")?(strlen($str)-$frm):($to-$frm);
$final = substr($str,$frm,$to);
echo $to."<br>";
echo $final."<br>";
}
$str = "1tag/Ilove.php2tag/youlike.java3tag/youlike.php";
img(1,$str);
img(2,$str);
img(3,$str);
答案 23 :(得分:0)
使用此小功能可以轻松完成此操作:
public interface IParser
{
List<object> Parse();
bool SupportsParsing(string key);
}
public class EventHandler : IHandler
{
private readonly IParser _parser;
public EventHandler(IParser parser)
{
_parser = parser;
}
public void Handle()
{ }
}
public class EventHandlerFactory
{
private readonly IEnumerable<IParser> _parsers;
public EventHandlerFactory(IEnumerable<IParser> parsers)
{
_parsers = parsers;
}
public IHandler Create(string key)
{
foreach (var parser in _parsers)
{
if (parser.SupportsParsing(key))
{
return new EventHandler(parser);
}
}
throw new NotImplementedException();
}
}
答案 24 :(得分:0)
考虑此功能。它接受位置编号和字符串参数:
total_dummy_rec
结果:
function get_string_between($string, $start = '', $end = ''){
if (empty($start)) {
$start = 0;
}elseif (!is_numeric($start)) {
$start = strpos($string, $start) + strlen($start);
}
if (empty($end)) {
$end = strlen($string);
}elseif (!is_numeric($end)) {
$end = strpos($string, $end);
}
return substr($string, $start, ($end - $start));
}
答案 25 :(得分:0)
在 php 中获取特定文本并推送到数组中:
<!DOCTYPE html>
<html>
<body>
<?php
function get_string_between($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);
}
$fullstring = '.layout {
color: {{ base_color }}
}
li {
color: {{ sub_color }}
}
.text {
color: {{ txt_color }}
}
.btn {
color: {{ btn_color }}
}
.more_text{
color:{{more_color}}
}';
$arr = [];
while(1){
$parsed = get_string_between($fullstring, '{{', '}}');
if(!$parsed)
break;
array_push($arr,$parsed);
$strposition = strpos($fullstring,"}}");
$nextString = substr($fullstring, $strposition+1, strlen($fullstring));
$fullstring = $nextString;
echo "<br>";
}
print_r($arr);
?>
</body>
</html>
没有数组:
<?php
function get_string_between($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);
}
$fullstring = '.layout {
color: {{ base_color }}
}
li {
color: {{ sub_color }}
}
.text {
color: {{ txt_color }}
}
.btn {
color: {{ btn_color }}
}
.more_text{
color:{{more_color}}
}';
while(1){
$parsed = get_string_between($fullstring, '{{', '}}');
if(!$parsed)
break;
echo $parsed;
$strposition = strpos($fullstring,"}}");
$nextString = substr($fullstring, $strposition+1, strlen($fullstring));
$fullstring = $nextString;
echo "<br>";
}
?>
对于单个输出,删除数组和循环。
<?php
function get_string_between($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);
}
$fullstring = '.layout {
color: {{ base_color }}
}
li {
color: {{ sub_color }}
}
.text {
color: {{ txt_color }}
}
.btn {
color: {{ btn_color }}
}
.more_text{
color:{{more_color}}
}';
$parsed = get_string_between($fullstring, '{{', '}}');
echo $parsed;
?>
答案 26 :(得分:0)
private function getStringBetween(string $from, string $to, string $haystack): string
{
$fromPosition = strpos($haystack, $from);
$toPosition = strpos($haystack, $to, $fromPosition);
$betweenLength = $toPosition - $fromPosition;
return substr($haystack, $fromPosition, $betweenLength);
}
答案 27 :(得分:0)
function getBetween($content,$start,$end){
$r = explode($start, $content);
if (isset($r[1])){
$r = explode($end, $r[1]);
return $r[0];
}
return '';
}
答案 28 :(得分:0)
@Alejandro Iglesias的UTF-8版本答案,适用于非拉丁字符:
function get_string_between($string, $start, $end){
$string = ' ' . $string;
$ini = mb_strpos($string, $start, 0, 'UTF-8');
if ($ini == 0) return '';
$ini += mb_strlen($start, 'UTF-8');
$len = mb_strpos($string, $end, $ini, 'UTF-8') - $ini;
return mb_substr($string, $ini, $len, 'UTF-8');
}
$fullstring = 'this is my [tag]dog[/tag]';
$parsed = get_string_between($fullstring, '[tag]', '[/tag]');
echo $parsed; // (result = dog)
答案 29 :(得分:0)
有一些错误捕获。具体来说,所提出的大多数功能都需要$ end存在,而实际上在我的情况下我需要它是可选的。使用这个是$ end是可选的,如果$ start根本不存在,则评估为FALSE:
function get_string_between( $string, $start, $end ){
$string = " " . $string;
$start_ini = strpos( $string, $start );
$end = strpos( $string, $end, $start+1 );
if ($start && $end) {
return substr( $string, $start_ini + strlen($start), strlen( $string )-( $start_ini + $end ) );
} elseif ( $start && !$end ) {
return substr( $string, $start_ini + strlen($start) );
} else {
return FALSE;
}
}
答案 30 :(得分:0)
一段时间后写了这些,发现它对广泛的应用程序非常有用。
<?php
// substr_getbykeys() - Returns everything in a source string that exists between the first occurance of each of the two key substrings
// - only returns first match, and can be used in loops to iterate through large datasets
// - arg 1 is the first substring to look for
// - arg 2 is the second substring to look for
// - arg 3 is the source string the search is performed on.
// - arg 4 is boolean and allows you to determine if returned result should include the search keys.
// - arg 5 is boolean and can be used to determine whether search should be case-sensative or not.
//
function substr_getbykeys($key1, $key2, $source, $returnkeys, $casematters) {
if ($casematters === true) {
$start = strpos($source, $key1);
$end = strpos($source, $key2);
} else {
$start = stripos($source, $key1);
$end = stripos($source, $key2);
}
if ($start === false || $end === false) { return false; }
if ($start > $end) {
$temp = $start;
$start = $end;
$end = $temp;
}
if ( $returnkeys === true) {
$length = ($end + strlen($key2)) - $start;
} else {
$start = $start + strlen($key1);
$length = $end - $start;
}
return substr($source, $start, $length);
}
// substr_delbykeys() - Returns a copy of source string with everything between the first occurance of both key substrings removed
// - only returns first match, and can be used in loops to iterate through large datasets
// - arg 1 is the first key substring to look for
// - arg 2 is the second key substring to look for
// - arg 3 is the source string the search is performed on.
// - arg 4 is boolean and allows you to determine if returned result should include the search keys.
// - arg 5 is boolean and can be used to determine whether search should be case-sensative or not.
//
function substr_delbykeys($key1, $key2, $source, $returnkeys, $casematters) {
if ($casematters === true) {
$start = strpos($source, $key1);
$end = strpos($source, $key2);
} else {
$start = stripos($source, $key1);
$end = stripos($source, $key2);
}
if ($start === false || $end === false) { return false; }
if ($start > $end) {
$temp = $start;
$start = $end;
$end = $temp;
}
if ( $returnkeys === true) {
$start = $start + strlen($key1);
$length = $end - $start;
} else {
$length = ($end + strlen($key2)) - $start;
}
return substr_replace($source, '', $start, $length);
}
?>
答案 31 :(得分:0)
我在这里使用的get_string_between()函数遇到了一些问题。所以我带着我自己的版本。也许它可以帮助与我相同的人。
protected function string_between($string, $start, $end, $inclusive = false) {
$fragments = explode($start, $string, 2);
if (isset($fragments[1])) {
$fragments = explode($end, $fragments[1], 2);
if ($inclusive) {
return $start.$fragments[0].$end;
} else {
return $fragments[0];
}
}
return false;
}
答案 32 :(得分:0)
使用:
function getdatabetween($string, $start, $end){
$sp = strpos($string, $start)+strlen($start);
$ep = strpos($string, $end)-strlen($start);
$data = trim(substr($string, $sp, $ep));
return trim($data);
}
$dt = "Find string between two strings in PHP";
echo getdatabetween($dt, 'Find', 'in PHP');
答案 33 :(得分:-1)
echo explode('/', explode(')', $string)[0])[1];
用你的第一个字符/字符串替换'/',用你的结束字符/字符串替换')'。 :)
答案 34 :(得分:-1)
我多年来一直在使用它,效果很好。可能会提高效率,但
grabstring(&#34;测试字符串&#34;,&#34;&#34;,&#34;&#34;,0)返回测试字符串
grabstring(&#34;测试字符串&#34;,&#34;测试&#34;,&#34;&#34;,0)返回字符串
grabstring(&#34;测试字符串&#34;,&#34; s&#34;,&#34;&#34;,5)返回字符串
function grabstring($strSource,$strPre,$strPost,$StartAt) {
if(@strpos($strSource,$strPre)===FALSE && $strPre!=""){
return("");
}
@$Startpoint=strpos($strSource,$strPre,$StartAt)+strlen($strPre);
if($strPost == "") {
$EndPoint = strlen($strSource);
} else {
if(strpos($strSource,$strPost,$Startpoint)===FALSE){
$EndPoint= strlen($strSource);
} else {
$EndPoint = strpos($strSource,$strPost,$Startpoint);
}
}
if($strPre == "") {
$Startpoint = 0;
}
if($EndPoint - $Startpoint < 1) {
return "";
} else {
return substr($strSource, $Startpoint, $EndPoint - $Startpoint);
}
}
答案 35 :(得分:-1)
function strbtwn($s,$start,$end){
$i = strpos($s,$start);
$j = strpos($s,$end,$i);
return $i===false||$j===false? false: substr(substr($s,$i,$j-$i),strlen($start));
}
用法:
echo strbtwn($s,"<h2>","</h2>");//<h2>:)</h2> --> :)