php 简单的对象(对象不嵌套) debug 输出

* getobjectvars.php

<?php
class foo {
    private $a = true;
    public $b = 1;
    public $c = "value of 'c'";
    private $d = 10.336;
    static $e = ["a", "b", "\n"];

    public function test() {
        var_dump(get_object_vars($this));
    }

    public function __toString() {
	$a = get_object_vars($this);
        $s = "{";
	foreach ($a as $name => $value) {
            $s .= sprintf("%s:\"%s\",", $name, addslashes($value));
	}
        // replace last , with }                                                                                                                          
	$s[strlen($s)-1] = "}";
	return $s;
    }
}

$test = new foo();

// $vars = get_object_vars($test);                                                                                                                        
echo $test.PHP_EOL;
// $test->test();

* test

php getobjectvars.php

{a:"1",b:"1",c:"value of \'c\'",d:"10.336"}

对于类似数组的结构, 数组封装字段 $_list

public function __toString() {
    $s = "[";
    foreach ($this->_list as $o) {
        $s .= $o->__toString().',';
    }
    $s[strlen($s)-1] = ']';
    return $s;
}

假设当前对象封装的数据在 $_data 字段

    public function __toString() {
        $s = "{";
        foreach ($this->_data as $name => $value) {
            if (is_numeric($value)) {
                $s .= sprintf("%s:%d,", $name, $value);
            } else if (is_bool($value)) {
                $s .= sprintf("%s:%s,", $name, $value ? 'true':'false');
            } else if(is_string($value)) {
                $s .= sprintf("%s:\"%s\",", $name, addslashes($value));
            } else {
                $s .= sprintf("%s:%s,", $name, \json_encode($value));
            }
        }
        // replace last , with }
        $len = strlen($s);
        if ($len > 1) {
            $s[strlen($s)-1] = "}";
        } else {
            $s .= "}";
        }
        return $s;
    }