如何判断php mysqli扩展类是否开启

2017-02-16 20:09:50 php
php高级版本都支持mysqli扩展类,但是默认情况下,mysqli扩展类是没有开启的,本文章向大家介绍php如何判断mysqli扩展类是否开启,需要的朋友可以参考一下

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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