php 扩展检查并加载

 1 <?php  
 2 /** 
 3  *列出所有加载的扩展及其包含的函数 
 4  */  
 5 $exts = get_loaded_extensions ();  
 6 foreach ( $exts as $ext ) {  
 7     $funs = get_extension_funcs ( $ext );  
 8     echo "当前扩展名称:" . $ext . "及其包含的函数<br>";  
 9     foreach ( $funs as $fun ) {  
10         echo "<li>$fun</li>";  
11     }  
12 }  
13 // Example loading an extension based on OS    
14 if (! extension_loaded ( \'sqlite\' )) {  
15     if (strtoupper ( substr ( PHP_OS, 0, 3 ) ) === \'WIN\') {  
16         dl ( \'php_sqlite.dll\' );  
17     } else {  
18         dl ( \'sqlite.so\' );  
19     }  
20 }  
21   
22 // Or, the PHP_SHLIB_SUFFIX constant is available as of PHP 4.3.0    
23 if (! extension_loaded ( \'sqlite\' )) {  
24     $prefix = (PHP_SHLIB_SUFFIX === \'dll\') ? \'php_\' : \'\';  
25     dl ( $prefix . \'sqlite.\' . PHP_SHLIB_SUFFIX );  
26 }  
27 ?>