提取字符串PHP中的两个字符之间的子字符串

Is there a php function that can extract a phrase between 2 different characters in a string? Something like substr();

是否有一个php函数可以在字符串中的两个不同字符之间提取短语?类似substr();

Example:

例子:

$String = [modid=256];

$First = "=";
$Second = "]";

$id = substr($string, $First, $Second);

Thus $id would be 256

因此$id为256

Any help would be appreciated :)

如有任何帮助，我们将不胜感激。

10 个解决方案

#1

use this code

使用这个代码

$input = "[modid=256]";
preg_match('~=(.*?)]~', $input, $output);
echo $output[1]; // 256

working example http://codepad.viper-7.com/0eD2ns

http://codepad.viper - 7. com/0ed2ns工作示例

#2

Use:

使用:

<?php

$str = "[modid=256]";
$from = "=";
$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));
}

?>

#3

$String = "[modid=256]";

$First = "=";
$Second = "]";

$Firstpos=strpos($String, $First);
$Secondpos=strpos($String, $Second);

$id = substr($String , $Firstpos, $Secondpos);

#4

If you don't want to use reqular expresion, use strstr, trim and strrev functions:

如果您不想使用请求程序，请使用strstr、trim和strrev函数:

// Require PHP 5.3 and higher
$id = trim(strstr(strstr($String, '='), ']', true), '=]');

// Any PHP version
$id = trim(strrev(strstr(strrev((strstr($String, '='))), ']')), '=]');

#5

Regular Expression is your friend.

正则表达式是你的朋友。

preg_match("/=(\d+)\]/", $String, $matches);
var_dump($matches);

This will match any number, for other values you will have to adapt it.

这将匹配任何数字，对于其他值，您将不得不调整它。

#6

You can use a regular expression:

您可以使用正则表达式:

<?php
$string = "[modid=256][modid=345]";
preg_match_all("/\[modid=([0-9]+)\]/", $string, $matches);

$modids = $matches[1];

foreach( $modids as $modid )
  echo "$modid\n";

http://eval.in/9913

#7

$str = "[modid=256]";
preg_match('/\[modid=(?P<modId>\d+)\]/', $str, $matches);

echo $matches['modId'];

#8

(moved from comment because formating is easier here)

(从注释中移动，因为这里更容易格式化)

might be a lazy approach, but in such cases i usually would first explode my string like this:

可能是一种懒惰的方法，但在这种情况下，我通常会先把我的绳子炸开，像这样:

$string_array = explode("=",$String);

and in a second step i would get rid of that "]" maybe through rtrim:

在第二步中，我将会摆脱那个"]"也许通过rtrim:

$id = rtrim($string_array[1], "]");

...but this will only work if the structure is always exactly the same...

…但这只有在结构总是完全相同的情况下才行得通……

-cheers-

干杯,

ps: shouldn't it actually be $String = "[modid=256]"; ?

是不是应该是$String = "[modid=256]" ?吗?

#9

Try Regular Expression

试的正则表达式

$String =" [modid=256]";
$result=preg_match_all('/(?<=(=))(\d+)/',$String,$matches);
print_r($matches[0]);

Output

输出

Array ( [0] => 256 )

数组([0]=> 256)

DEMO

演示

Explanation Here its used the Positive Look behind (?<=)in regular expression eg (?<=foo)bar matches bar when preceded by foo, here (?<=(=))(\d+) we match the (\d+) just after the '=' sign. \d Matches any digit character (0-9). + Matches 1 or more of the preceeding token

这里的解释是，它在正则表达式eg (?<=foo)bar中使用了带正值的Look behind (?\d匹配任何数字字符(0-9)。+匹配一个或多个前标记

#10

-1

You can use a regular expression or you can try this:

您可以使用正则表达式，也可以尝试以下方法:

$String = "[modid=256]";

$First = "=";
$Second = "]";
$posFirst = strpos($String, $First); //Only return first match
$posSecond = strpos($String, $Second); //Only return first match

if($posFirst !== false && $posSecond !== false && $posFirst < $posSecond){
    $id = substr($string, $First, $Second);
}else{
//Not match $First or $Second
}

You should read about substr. The best way for this is a regular expression.

您应该了解substr。最好的方法是使用正则表达式。

#1