字符串操作

替换字符串

str =str.replace(/\;/g, ",");//将分号替换成逗号

删除第一个字符

 str=str.substr(1);//删除字符串第一个字符

删除最后一个字符

str=str.substring(0,str.length-1);  //删除字符串最后一个字符

 截取字符串

stringObject.substr(start [, length ]) 

php截取字符串

php
  //构造字符串
  $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  echo "原字符串：".$str."
";
  //按各种方式进行截取
  $str1 = substr($str,5);
  echo "从第5个字符开始取至最后：".$str1."
";
  $str2 = substr($str,9,4);
  echo "从第9个字符开始取4个字符：".$str2."
";
  $str3 = substr($str,-5);
  echo "取倒数5个字符：".$str3."
";
  $str4 = substr($str,-8,4);
  echo "从倒数第8个字符开始向后取4个字符：".$str4."
";
  $str5 = substr($str,-8,-2);
  echo "从倒数第8个字符开始取到倒数第2个字符为止：".$str5."
";
 ?>

 匹配字符串

str.indexOf(value);

 

转载于:https://www.cnblogs.com/snowbaby-kang/p/4072826.html