如何判断php mysqli扩展类是否开启

如何判断phpmysqli扩展类是否开启php判断mysqli扩展类是否开启,源码如下：<?php/*byhttp://www

如何判断php mysqli扩展类是否开启

php判断mysqli扩展类是否开启,源码如下：

<?php
 /* by http://www.manongjc.com/article/1206.html */
 function mysqlinstalled (){
 if (function_exists ("mysql_connect")){
 return true;
 } else {
 return false;
 }
 }
 function mysqliinstalled (){
 if (function_exists ("mysqli_connect")){
 return true;
 } else {
 return false;
 }
 }
 
 if (mysqlinstalled()){
 echo "<p>The mysql extension is installed.</p>";
 } else {
 echo "<p>The mysql extension is not installed..</p>";
 }
 if (mysqliinstalled()){
 echo "<p>The mysqli extension is installed.</p>";
 } else {
 echo "<p>The mysqli extension is not installed..</p>";
 }
?>

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如何判断php mysqli扩展类开启 判断php mysqli扩展类开启