正文
php实现var_dump函数
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
<?php
class VarDump
{
private static $isInLoop = false;
private static $buffer = false; public static function dump()
{
$args = func_get_args();
$args_num = func_num_args();
if (self::$buffer && $args_num == 1) {
$args = func_get_args();
$args = isset($args[0]) ? $args[0] : [];
if (!empty($args) && (is_array($args) || is_object($args))) {
$args_num = count($args);
}
}
self::$buffer = false;
for ($i = 0; $i < $args_num; ++$i) {
$param = $args[$i];
$ptype = gettype($param);
switch ($ptype) {
case "NULL":
self::dump_null();
break;
case "boolean":
self::dump_boolean($param);
break;
case "integer":
self::dump_integer($param);
break;
case "double":
self::dump_double($param);
break;
case "string":
self::dump_string($param);
break;
case "array":
self::dump_array($param);
break;
case "object":
self::dump_object($param);
break;
case "resource":
echo "resource";
break;
default:
echo "unknown type";
}
}
} public static function dumpx()
{
self::$buffer = true;
ob_start();
self::dump(func_get_args());
$var = ob_get_clean();
return $var;
} public static function dump_null()
{
echo "NULL";
if (!self::$isInLoop) {
echo "\n";
}
self::$isInLoop = false;
} public static function dump_boolean($bool)
{
if ($bool) {
echo "bool(true)";
} else {
echo "bool(false)";
}
if (!self::$isInLoop) {
echo "\n";
}
self::$isInLoop = false;
} public static function dump_integer($int)
{
echo "int($int)";
if (!self::$isInLoop) {
echo "\n";
}
self::$isInLoop = false;
} public static function dump_double($double)
{
echo "float($double)";
if (!self::$isInLoop) {
echo "\n";
}
self::$isInLoop = false;
} public static function dump_string($str)
{
$len = strlen($str);
$value = "string($len) \"$str\"";
echo $value;
if (!self::$isInLoop) {
echo "\n";
}
self::$isInLoop = false;
} public static function dump_array($arr)
{
static $pads = [];
$keys = array_keys($arr);
$len = count($arr);
echo "array($len) {";
array_push($pads, " ");
for ($i = 0; $i < $len; $i++) {
echo "\n", implode('', $pads), "[\"$keys[$i]\"] => ";
$index = $keys[$i];
self::$isInLoop = true;
self::dump($arr[$index]);
}
array_pop($pads);
$pad = implode('', $pads);
echo "\n{$pad}}";
if ($pad == '') {
echo "\n";
}
} public static function dump_prop($obj)
{
static $pads = [];
$reflect = new ReflectionClass($obj);
$prop = $reflect->getProperties();
$len = count($prop);
echo "($len) {";
array_push($pads, " ");
for ($i = 0; $i < $len; $i++) {
$index = $i;
if (!$prop[$index]->isPublic()) {
continue;
}
$prop_name = $prop[$index]->getName();
echo "\n", implode('', $pads), "[\"{$prop_name}\"] => ";
self::$isInLoop = true;
self::dump($prop[$index]->getValue($obj));
}
array_pop($pads);
$pad = implode('', $pads);
echo "\n{$pad}}";
if ($pad == '') {
echo "\n";
}
} public static function dump_object($obj)
{
static $objId = 1;
$className = get_class($obj);
echo "object($className)#$objId";
$objId++;
self::dump_prop($obj);
}
} /* examples */ //test string and integer
$string = "I am a string";
$int = 1002;
VarDump::dump($string);
VarDump::dump($int); //test object
class test1
{
public $var1;
public static $var2 = 'var2';
private $var3 = 333; function test()
{
echo "test1 method";
}
}
class MyClass
{
public $var4 = 4444;
protected $var5 = 55555;
public $test1 = null; function __construct()
{
$this->test1 = new test1();
} function test()
{
echo "MyClass method";
}
}
VarDump::dump(new MyClass()); //test array
$arrTest = array(
"name" => "jim",
"courses" => array(
"Physics" => "2016-2017",
"Mathematics" => array(
"Geometry" => "2017-2018",
"Algebraic" => "2015-2016",
)
),
"age" => 20,
"gender" => 'male',
"teacher" => array(
"Physics" => "lucy",
"Geometry" => "lilei",
"Algebraic" => "Russell",
)
);
echo VarDump::dumpx($arrTest); //outputs:
/*
string(13) "I am a string"
int(1002)
object(MyClass)#1(3) {
["var4"] => int(4444)
["test1"] => object(test1)#2(3) {
["var1"] => NULL
["var2"] => string(4) "var2"
}
}
array(5) {
["name"] => string(3) "jim"
["courses"] => array(2) {
["Physics"] => string(9) "2016-2017"
["Mathematics"] => array(2) {
["Geometry"] => string(9) "2017-2018"
["Algebraic"] => string(9) "2015-2016"
}
}
["age"] => int(20)
["gender"] => string(4) "male"
["teacher"] => array(3) {
["Physics"] => string(4) "lucy"
["Geometry"] => string(5) "lilei"
["Algebraic"] => string(7) "Russell"
}
}
*/
