php 扩展检查并加载
<?php/** *列出所有加载的扩展及其包含的函数 */$exts = get_loaded_extensions ();foreach ( $exts as $ext ) { $funs = get_extension_funcs ( $ext ); echo "当前扩展名称:" . $ext . "及其包含的函数<br>"; foreach ( $funs as $fun ) { echo "<li>$fun</li>"; }}// Example loading an extension based on OS if (! extension_loaded ( 'sqlite' )) { if (strtoupper ( substr ( PHP_OS, 0, 3 ) ) === 'WIN') { dl ( 'php_sqlite.dll' ); } else { dl ( 'sqlite.so' ); }}// Or, the PHP_SHLIB_SUFFIX constant is available as of PHP 4.3.0 if (! extension_loaded ( 'sqlite' )) { $prefix = (PHP_SHLIB_SUFFIX === 'dll') ? 'php_' : ''; dl ( $prefix . 'sqlite.' . PHP_SHLIB_SUFFIX );}?> 
