要切换到PHP 4.4：
AddHandler application/x-httpd-PHP4 .PHP
要切换到PHP 5.0：
AddHandler application/x-httpd-PHP5 .PHP
要切换到PHP 5.1：
AddHandler application/x-httpd-PHP51 .PHP
要切换到PHP 5.2：
AddHandler application/x-httpd-PHP52 .PHP
要切换到PHP 5.3，请执行以下操作：
AddHandler application/x-httpd-PHP53 .PHP
要切换到PHP 5.4：
AddHandler application/x-httpd-PHP54 .PHP
要切换到PHP 5.5：
AddHandler application/x-httpd-PHP55 .PHP
要切换到PHP 5.6：
AddHandler application/x-httpd-PHP56 .PHP
要切换到PHP 7：
AddHandler application/x-httpd-PHP7 .PHP
要切换到PHP 7.1，请执行以下操作：
AddHandler application/x-httpd-PHP71 .PHP
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