[php learning 2] Basic grammar exercises 2
The basic syntax of
<head>
<meta charset="UTF-8">
<title>Second Php</title>
</head>
<?php
/**
* Created by PhpStorm.
* User: liyanq
* Date: 16/7/5
* Time: 13:15
*/
/*
* 1,什么头都不加的话,显示乱码,知道是编码格式问题,拷过来就好了;但还不了解上面语法,以后再说吧.
* 2,汉字的排序不是按照拼音的首字母来的.
* 3,sort,rsort普通数组;asort,ksort,arsort,krsort关联数组;
* */
$names = array("梅西","c罗","贝尔");
$nameAndage = array("梅西"=>29,"C罗"=>31,"贝尔"=>26);
function NormalarrToStr($arr){
$r = "";
for ($x = 0; $x < count($arr); $x ++){
$r = $r . " " . $arr[$x];//用.链接字符串真别扭啊~!
}
return $r;
}
function KeyValueArrToStr($arr){
$r = "";
foreach($arr as $x => $xValue){
$r = $r . " " . "[$xValue]$x";
}
return $r;
}
echo "排序前:",NormalarrToStr($names),"<br>";
sort($names);
echo "排序后:",NormalarrToStr($names),"<br>";
echo "排序前:",KeyValueArrToStr($nameAndage),"<br>";
ksort($nameAndage);
echo "排序后:",KeyValueArrToStr($nameAndage),"<br>";
/*
* 1,$GLOBALS是一个包含了全部变量的全局组合数组。变量的名字就是数组的键;
* 2,$GLOBALS里面的内容都挺有用的.可以搜集客户信息.http://www.runoob.com/php/php-superglobals.html
* 3,$_REQUEST能够获取HTML表单提交的数据,只要知道Input的名字即可.可理解2页面的通讯通道;
* */
$x = 25;$y=75;
function TestGlobals(){
global $x;
$GLOBALS['z'] = $x + $GLOBALS['ya'];
}
TestGlobals();
echo $z,'<br>';
echo $_SERVER["PHP_SELF"],'<br>';
echo $_SERVER["SERVER_NAME"],'<br>';
echo $_SERVER["HTTP_HOST"],"<br>";
echo $_SERVER["SERVER_ADDR"],"<br>";
echo $_SERVER["REQUEST_METHOD"],"<br>";
echo $_SERVER["REMOTE_ADDR"],"<br>";
echo $_SERVER["SCRIPT_FILENAME"],"<br>";
?>
<!--1,才知道form里的Action里面的Echo是起到页面导航用的.-->
<!--2,不写或者echo $_SERVER["PHP_SELF"];都是提交后返回自己页面.-->
<!--3,导航其他页面,不用写绝对路径.-->
<!--显示Post提交的内容:$_REQUEST和POST是一对儿;-->
<form method="post" action="<?php
echo $_SERVER["PHP_SELF"];
//echo "FirstHello.php";
?>">
<h3>Name:</h3>
<input type="text" name="Text1">
<input type="submit" name="Button1">
<input type="time">
</form>
<?php
$InputText = $_REQUEST["Text1"];
$InputStr = $_REQUEST["Button1"];
echo "POST提交内容:", $InputText, $InputStr ,"<br>";
?>
<!--显示Get提交的内容:$_GET和GET是一对儿;-->
<a href="<?php print $_SERVER["PHP_SELF"];?>?Param1=参数1&Param2=参数2">测试GET</a>
<?php echo "Get Param1:" . $_GET['Param1'] . "Get Param2: " . $_GET['Param2'] . "<br>"; ?>
<?php
function TestVar(&$var){
$var++;
echo "__FUNCTION__:",__FUNCTION__,"<br>";
}
$x = 1;
TestVar($x);
echo $x . "<br>";//结果是2,&传址;
echo "__Line__:",__LINE__,"__File__:",__FILE__,"<br>";
echo "__Dir__:",__DIR_,"<br>";
class TestGlobalVar{
function MyFun1(){
echo "__FUNCTION__",__FUNCTION__, ";__Class__:",__CLASS__,"<br>";
}
}
$V1 = new TestGlobalVar();
$V1->MyFun1();
class MyBase{
function SayHello(){
echo "Hello";
}
}
//trait这个语法没有见到过,需要留意下.~
trait TraitSay{
public function SayHello(){
parent::SayHello();
echo "World";
}
}
class MyChild extends MyBase{
use TraitSay;
}
$c = new MyChild();
$c->SayHello();
?>
The above introduces [php learning 2] basic grammar exercise 2, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.
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