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PHP读写文件失败 PHP读写文件失败<?php $fp = fopen("cnbruce.txt","w+"); fwrite($fp,"1111"); ?>问题分析进入所在目录[root@website wwwroot]# ll总用量 36-rwx------. 1 www www 168 4月 14 00:57 access_token.daodrwx------. 2 www www 57 4月 13 14:22 china_weather-rwx------. 1 www www 1599 4月 11 20:55 get_access_token.php-rwx------. 1 www www 25202 4月 13 21:16 index.phpdrwxr-xr-x. 2 root root 23 4月 14 19:43 jijin发现文件权限属组是root，因为是在root下创建的目录问题解决更改属组问题chown www:www jijin打开php网页验证 -
PHP随机生成双色球 PHP随机生成双色球输出效果 双色球抽取 .red_ball{ position: relative; float: left; width: 50px; height: 50px; border-radius: 50%; background-color: red; text-align: center; line-height: 50px; margin: 5px; font-size: 25px; color: white; } .blue_ball{ position: relative; float: left; width: 50px; height: 50px; border-radius: 50%; background-color: blue; text-align: center; line-height: 50px; margin: 5px; font-size: 25px; color: white; } 15132807310307 源代码函数解释range()生成数组array_rand()随机取数组中的几个下标或键名shuffle()打乱数组顺序rand(min,max)生成指定范围随机数<!DOCTYPE html> <html> <meta charset="utf8"/> <head> <title>双色球抽取</title> <style> .red_ball{ position: relative; float: left; width: 50px; height: 50px; border-radius: 50%; background-color: red; text-align: center; line-height: 50px; margin: 5px; font-size: 25px; color: white; } .blue_ball{ position: relative; float: left; width: 50px; height: 50px; border-radius: 50%; background-color: blue; text-align: center; line-height: 50px; margin: 5px; font-size: 25px; color: white; } </style> </head> <body> <?php //创建红球的数组范围 $red_num = range(1,33); //随机在红球范围内取出6个数 //array_rand()取的是数组的下标或者键名 $red = array_rand($red_num,6); //打乱数组顺序 shuffle($red); //输出红球 foreach($red as $i){ $ls = $red_num[$i]; if($ls<10)$ls = '0' . $ls; echo "<div class='red_ball'>$ls</div>"; } //从1-16中随机取出一个数字 $blue = rand(1,16); if($blue<10)$blue = '0' . $blue; echo "<div class='blue_ball'>$blue</div>"; ?> </body> </html>
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PHP数组订单 PHP数组订单 table{ text-align: center; } td{ text-align: center; width: 200px; } PHP数组订单 订单 物品价格地方数量小计主板379广东31137显卡799上海21598硬盘589北京52945总计：5680 <!DOCTYPE html> <meta charset="utf-8" /> <head> <style> table{ text-align: center; } td{ text-align: center; width: 200px; } </style> <title>PHP数组订单</title> <?php $title = array('物品','价格','地方','数量','小计'); $goods = array( array('name'=>'主板','price'=>'379','producing'=>'广东','num'=>3), array('name'=>'显卡','price'=>'799','producing'=>'上海','num'=>2), array('name'=>'硬盘','price'=>'589','producing'=>'北京','num'=>5), ); echo "<table border='1'><tr> <th colspan='5'>订单</th> </tr><tr>"; foreach($title as $i => $ii){ echo "<td>$ii</td>"; } echo "</tr>"; $sum_price = 0; foreach($goods as $i => $ii){ echo "<tr>"; foreach($ii as $j => $k){ echo "<td>$k</td>"; if($k == end($ii)) { $small_price = $ii['price'] * $ii['num']; $sum_price+=($small_price); echo "<td>$small_price</td>"; } } echo "</tr>"; } echo "<tr><td colspan='5'>总计：$sum_price</td></tr></table>"; ?> </head> </html>
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PHP 循环 PHP 循环PHP while循环输出金字塔<?php $i = 1; $line = 10; while($i<=$line){ $j = $line - $i; $k = 2 * $i - 1; while($j>0){ $j--; echo " "; } while($k>0){ $k--; echo "*"; } echo "<br />"; $i++; } ?>PHP for循环输出九九乘法表<?php echo ("<style>td{border:2px solid black;text-align:center;padding:5px;}</style><table>"); for($i=1;$i<=9;$i++){ for($ii=1;$ii<=$i;$ii++){ echo ("<td>" . $ii . "x" . $i . "=" . $i*$ii . "</td>"); } echo ("<tr/>"); } echo ("</table>") ?>PHP forearm遍历数字索引数组所有值<?php $sz = array(1,2,3,4,5,6,7,8,9); foreach($sz as $i){ echo $i . "<br/>"; } foreach($sz as $i => $k){ echo "索引：" . $i . " 值：" . $k . "<br/>"; } ?>遍历字符关联数组(键值对)<?php $key_value0 = array('name'=>'手机','num'=>'5','price'=>'4500'); foreach($key_value0 as $i){ echo "$i "; } echo ('<br>'); foreach($key_value0 as $i => $j){ echo "键名：$i 键值：$j <br/>"; } $key_value = array( array('name'=>'手机','num'=>'5','price'=>'4500'), array('name'=>'电脑','num'=>'15','price'=>'10500'), array('name'=>'鼠标','num'=>'500','price'=>'20'), array('name'=>'键盘','num'=>'500','price'=>'20') ); foreach($key_value as $i){ foreach($i as $k => $v){ echo $k . '----' . $v . ' '; } echo '<br/>'; } foreach($key_value as $ii){ echo '物品：' . $ii['name'] . ' 数量：' . $ii['num'] . ' 价格：' . $ii['price'] . "<br/>"; } ?>
