哪个高手有空帮我看一个函数,弄半天了不行
<?php
function glstrlen($str)
{
$tmp_array = explode(",",$str);
if(strlen($str)>30) {
array_pop($tmp_array);
$str = implode(",",$tmp_array);
if(strlen($str)>30) {
glstrlen($str);
} else {
return $str;
}
} else {
return $str;
}
}$strs = "Woods,trees,grass ,grassland,Yellow, motorcycle,highway";
$a = glstrlen($strs);
echo $a;
?>
按单词从前面截取字符串,控制在30个字符以内的长度,调试半天,不知道函数内部哪里不对,返回值为空,奇怪了,请高手帮我看看,多谢了,在线等着。
<?php
function glstrlen($str)
{
$tmp_array = explode(",",$str);
if(strlen($str)>30) {
array_pop($tmp_array);
$str = implode(",",$tmp_array);
if(strlen($str)>30) {
glstrlen($str);
} else {
return $str;
}
} else {
return $str;
}
}$strs = "Woods,trees,grass ,grassland,Yellow, motorcycle,highway";
$a = glstrlen($strs);
echo $a;
?>
按单词从前面截取字符串,控制在30个字符以内的长度,调试半天,不知道函数内部哪里不对,返回值为空,奇怪了,请高手帮我看看,多谢了,在线等着。
$strs = "Woods,trees,grass ,grassland,Yellow, motorcycle,highway";
$array = explode(',' , $strs);
print_r(array_pad($array,30,'.'));
function glstrlen($str)
{
$tmp_array = explode(",",$str);
if(strlen($str)>30) {
// var_dump($str);
array_pop($tmp_array);
$str = implode(",",$tmp_array);
if(strlen($str)>30) {
// 加了个判断,如果有返回值,那么就退出,这样层层退出,调用才算结束
if(!is_null($str = glstrlen($str)) ) {
return $str;
}
} else {
return $str;
}
} else {
return $str;
}
}
$arr =explode(',', $str);
while(strlen($str) > 30) {
array_pop($arr);
$str = join(',', $arr);
}
return $str;
}
echo glstrlen("Woods,trees,grass ,grassland,Yellow, motorcycle,highway");
if(strlen($str)>30) {
$tmp_array = explode(",",$str);
array_pop($tmp_array);
$str = implode(",",$tmp_array);
return glstrlen($str);
}
return $str;
}$strs = "Woods,trees,grass ,grassland,Yellow, motorcycle,highway";
$a = glstrlen($strs);
echo $a;Woods,trees,grass ,grassland