php filter_var 使用 FILTER_VALIDATE_REGEXP
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时间:2020-08-24 23:33:05 来源:igfitidea点击:
filter_var using FILTER_VALIDATE_REGEXP
提问by Iris
I'm practicing my beginner php skills and would like to know why this script always returns FALSE?
我正在练习我的初学者 php 技能,想知道为什么这个脚本总是返回 FALSE?
What am i doing wrong?
我究竟做错了什么?
$namefields = '/[a-zA-Z\s]/';
$value = 'john';
if (!filter_var($value,FILTER_VALIDATE_REGEXP,$namefields)){
$message = 'wrong';
echo $message;
}else{
$message = 'correct';
echo $message;
}
回答by Cranio
The regexp should be in an options array.
正则表达式应该在一个选项数组中。
$string = "Match this string";
var_dump(
filter_var(
$string,
FILTER_VALIDATE_REGEXP,
array(
"options" => array("regexp"=>"/^M(.*)/")
)
)
); // <-- look here
Also, the
此外,该
$namefields = '/[a-zA-Z\s]/';
should be rather
应该是
$namefields = '/[a-zA-Z\s]*/'; // alpha, space or empty string
or
或者
$namefields = '/[a-zA-Z\s]+/'; // alpha or spaces, at least 1 char
because with the first version I think you match only single-character strings
因为第一个版本我认为你只匹配单字符串

