日常使用

截取替换

$bank_num= 1234567891231496;

substr_replace($bank_num, '*****', 6, 8) 

$bank_num是整数,'*****'替换内容,6是开始位数,8是替换个数

floatval用于获取变量的浮点值。

$var = '122.34343runoob';

$float_value_of_var = floatval ($var);

echo $float_value_of_var; 
122.34343

explode(',', $list['hk_img']);数组转字符串

php 抓取页面内容

  $html = file_get_contents($url);
  //如果出现中文乱码使用下面代码
  //$getcontent = iconv("gb2312", "utf-8",$html);
  echo "<textarea style='800px;height:600px;'>".$html."</textarea>";
 
     
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$html = curl_exec($ch);
curl_close($ch);
 
echo "<textarea style='800px;height:600px;'>".$html."</textarea>";
原文地址:https://www.cnblogs.com/f-z-g-boke/p/10478638.html