PHP进阶篇_技术问答

首页免费课 PHP进阶篇问答

PHP进阶篇

全部评论问答未解决精华

black lotus

public function __call($name,$args){
if($name=='speedDown'){
$this->speed-=10;
}
}

0 2-9 PHP类和对象之重载

2017-07-13

black lotus

class Truck extends Car{
public function speedUp(){
parent::speedUp();
$this->speed+=50;
return $this->speed;
}
}

1 2-8 PHP类和对象之对象继承

2017-07-13

明日暴发户

$str = '100.1';
$result = sprintf('%02.3f',$str);
echo $result;

$str = '100.1';
$result = sprintf('%0.3f',$str);
echo $result;

$str = '100.1';
$result = sprintf('%.3f',$str);
echo $result;

这三种输出既然是一样的结果

2017-07-13

慕婉清5631217

<?php
//分隔字符串
$str = 'sun-moon-star';
$array=explode("-",$str);
foreach($array as $key =>$a){
echo $a;
}
?>

2017-07-12

慕婉清5631217

中文前面加mb_
中英文都有都加mb_
小伙伴们这章是暴风雨的前夜

2017-07-12

qq_跟我走_3

$str = preg_replace('/(\w+.\w+)/','<em>$1</em>',$str);

0 3-7 正则表达式的搜索和替换

2017-07-12

qq__9835

class Run{
public static function say1(){
return 1;
}
public static function say2(){
return 2;
}
public static function say3(){
return 3;
}
}
echo Run::say1()."<br>";
echo Run::say2()."<br>";
$three = 'say3';
$className = 'Run';
echo $className::$three();

0 2-6 PHP类和对象之Static静态关键字

2017-07-12