多个ob_start（）和ob_get_clean（）

Question

我想用一些函数替换文本中的项目。例如，我想从所见即所得的滑块，我写这样的{SLIDER_8879}，其中SLIDER-是功能类型，8879-是参数（例如文件夹）。

因此，例如：

<?php 
    function xxx($fname, $value){ 
echo"<span style='color:orange;'>$fname|$value this is CAROUSEL</span> "; 
} 

function callback ($match) { 
    if ($match[2] === "SLIDER"){ 
     return "<span style='color:red'>This is a slider</span>"; 
    }else if($match[2] === "POLL"){ 
     return rand(8888888888, 8888888888888888888888);    
    }else if($match[2] === "CAROUSEL"){ 
     xxx($match[2], $match[4]); 
    }else{ 
     echo"<span style='color:blue'>ESIM INCH!</span>"; 
    } 
} 

$body = "{{SLIDER_fff}} sdfasdfas dfasd {{POLL_8879}} dsgasdgasdgds {{CAROUSEL_888}} sdffasd f asd f a {{SLIDER_8879-folder}} dfgdf g dsfsfgfg d fdfgd {{BIBIN_folder}} sdfsdf"; 
$pattern = "/({{2})([A-Z]+)(_{1})([a-zA-Z0-9_\-]+)(}{2})/"; 
$body = preg_replace_callback($pattern, "callback", $body); 

echo $body; 
?> 

我得到这个排序：

轮转| 888这是轮转ESIM INCH这是一款滑盖sdfasdfas dfasd 123055895 dsgasdgasdgds sdffasd˚FASD发这是一款滑盖dfgdf克dsfsfgfg d fdfgd sdfsdf

想要拥有权保换顺序：

这是一个滑块sdfasdfas dfasd 123055895个dsgasdgasdgdsç AROUSEL | 888这是CAROUSEL sdffasd f asd f a这是一个滑块dfgdf g dsfsfgfg d fdfgd ESIM INCH！ sdfsdf

Answer 1

该回调应该返回替换字符串。

也许这更新的代码是你在找什么：

<?php 
function xxx($fname, $value){ 
    return "<span style='color:orange;'>$fname|$value this is CAROUSEL</span> "; 
} 

function callback ($match) { 
    if ($match[2] === "SLIDER"){ 
     return "<span style='color:red'>This is a slider</span>"; 
    }else if($match[2] === "POLL"){ 
     return rand(8888888888, 8888888888888888888888); 
    }else if($match[2] === "CAROUSEL"){ 
     return xxx($match[2], $match[4]); 
    }else{ 
     return "<span style='color:blue'>ESIM INCH!</span>"; 
    } 
} 

$body = "{{SLIDER_fff}} sdfasdfas dfasd {{POLL_8879}} dsgasdgasdgds {{CAROUSEL_888}} sdffasd f asd f a {{SLIDER_8879-folder}} dfgdf g dsfsfgfg d fdfgd {{BIBIN_folder}} sdfsdf"; 
$pattern = "/({{2})([A-Z]+)(_{1})([a-zA-Z0-9_\-]+)(}{2})/"; 
$body = preg_replace_callback($pattern, "callback", $body); 

echo $body; 
?>