无法使用自定义函数在PHP中格式化字符串

Question

<?php
$string = 'tHis is aN unEVen string that needs to be formated properly';

// custom function created combining multiple functions
function varform($var){
   ucwords(strtolower(htlmentities(trim($var))));
   return $var;
}

$string = varform($string);
echo $string;
?>

Answer 1

您需要将所有操作的结果分配给即将返回的变量

<?php
$string = 'tHis is aN unEVen string that needs to be formated properly';

// custom function created combining multiple functions
function varform($var){
   // assign change to the variable
   $var = ucwords(strtolower(htmlentities(trim($var))));
   return $var;
}

$string = varform($string);
echo $string;
?>

Answer 2

您的代码存在两个问题

function varform($var){
   ucwords(strtolower(htlmentities(trim($var))));
------------------------^ //It's htmlentities() not htlmentities()
   return $var; //you're just returning the value that is passed to the method
}

您需要从PHP方法获取返回值并从函数中返回

function varform($var){
   $var = ucwords(strtolower(htmlentities(trim($var))));
   return $var;
}

Answer 3

1）用htmlentities替换htlmentities

正如之前的评论者所说

function varform($var){
  return ucwords(strtolower(htmlentities(trim($var))));
}