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HomeBackend DevelopmentPHP Tutorial利用浏览器的Javascript控制台调试PHP程序_PHP

PHP是一种服务器端脚本语言,用来开发动态web应用程序。与JAVA相比,没有一个好的服务器端调试工具是其限制之一。通常我们都是在PHP代码中添加echo、var_dump等语句,将变量、数组的值显示在浏览器中来达到调试的目的。

现在,越来越多的浏览器都有了开发这工具或者Javascript控制台,通过这些工具,我们可以很方便的显示PHP代码中的变量或数组值。下面我们来做一个例子。例子中的PHP代码有四个跟踪级别:info, warn, log, error,开发人员可以使用浏览器控制台来显示错误变量,数组值。

将下面代码拷贝到PHP文件中,并保存为WebConsole.php
复制代码 代码如下:
class WebConsole {

private static function write($data, $type = 'info') {
$method_types = array('error', 'info', 'log', 'warn');
$msg_type = '';(PS:T不错的PHP Q扣峮:304224365,验证:csl)
if(in_array($type, $method_types)) {
$msg_type = sprintf("console.%s", $type);
}else {
$msg_type = sprintf("console.%s", 'info');
}

if(is_array($data)) {
echo("<script>$msg_type('".implode(', ', $data)."');</script>");
} else {
echo("<script>$msg_type('".$data."');</script>");
}
}

public static function info($data) {
self::write($data);
}

public static function error($data) {
self::write($data, 'error');
}

public static function log($data) {
self::write($data, 'log');
}

public static function warn($data) {
self::write($data, 'warn');
}

}
?>

现在,导入WebConsole类,并使用跟踪功能。
复制代码 代码如下:
require_once('WebConsole.php');
$fruits = array('apple', 'mange', 'banana');
WebConsole::log($fruits);
WebConsole::info($fruits);
WebConsole::warn($fruits);
WebConsole::error($fruits);
?>

现在打开你的浏览器控制台,你会发现出现类似下面的屏幕截图:
利用浏览器的Javascript控制台调试PHP程序_PHP

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