PHP用法

php语言介绍

';
    echo $a;
    echo $b;
    
    //单引号
    echo '$a+$b';
    //双引号
    echo "$a+$b";
?>

php语法的流程控制代码

";
      $i++;
      }

      
//-----------------第2种循环结构do...while 语句--------------  
      $i=0;
        do
          {
          $i++;
          echo "The number is " . $i . "
";
          }
        while ($i<5);
        
//-----------------第3种循环结构for 语句--------------  

        for ($i=1; $i<=5; $i++)
        {
          echo "循环到："$i;
        }
      
?>

php中的数组

';
        
    }
    
    
    //输出数组name2
    echo $name2[1] . " and " . $name2[2] . " are ". $name2[0] . "'s neighbors";
    
    //输出数组name2
    foreach ($name2 as $value)
    {
      echo "Value: " . $value . "
";
    }

    //输出数组ages
    foreach($ages as $key=>$value){
        echo "key:$key,value:$value";
    }
    
  //遍历数组ages
    for($i=0;$i';
   }

?>

php函数

";
  }

    echo "My name is ";
    writeMyName("David");
    
    echo "My name is ";
    writeMyName("Mike");
    
    echo "My name is ";
    writeMyName("John");


?>