preg_replace_callback函数

$val = preg_replace("/[([^[]]*)]/eis", "'.'.str_replace('$','$','\1')", $val);

$val = preg_replace_callback("/[([^[]]*)]/eis", function($match){ return str_replace('$','$',$match)}, $val);

$val = preg_replace_callback(        '/[([^[]]*)]/is',        function ($matches) {            return '.'.str_replace('$','$',$matches[1]);        },        $val    );echo $val;

$out = "<?php 
" . '$k = ' . preg_replace("/('\$[^,]+)/e" , "stripslashes(trim('\1','''));", var_export($t, true)) . ";
";

$out = "<?php 
" . '$k = ' . preg_replace("/('\$[^,]+)/e" , "stripslashes(trim('\1','''));", var_export($t, true)) . ";
";

$out = "<?php 
" . '$k = ' . preg_replace_callback("/('\$[^,]+)/" , function($ro) { return stripslashes(trim($ro[1],'''));}, var_export($t, true)) . ";
";

$pattern = '/<!--s#BeginLibraryItems"/(.*?)"s-->.*?<!--s#EndLibraryItems-->/s';$replacement = "'{include file='.strtolower('\1'). '}'";$source = preg_replace_callback($pattern, $replacement, $source);

$pattern = '/<!--s#BeginLibraryItems"/(.*?)"s-->.*?<!--s#EndLibraryItems-->/s';$replacement = "'{include file='.strtolower('\1'). '}'";$source = preg_replace_callback($pattern, $replacement, $source);

$pattern = '/<!--s#BeginLibraryItems"/(.*?)"s-->.*?<!--s#EndLibraryItems-->/s';$replacement = "'{include file='.strtolower('\1'). '}'";$source = preg_replace_callback($pattern, $replacement, $source);

$replacement = "'{include file='.strtolower('\1'). '}'";