PHP：将一个字符串拆分为一个数组 foreach char
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PHP: Split a string in to an array foreach char
提问by matthy
I am making a method so your password needs at least one captial and one symbol or number. I was thinking of splitting the string in to lose chars and then use preggmatch to count if it contains one capital and symbol/number.
我正在制作一种方法，因此您的密码至少需要一个大写字母和一个符号或数字。我正在考虑将字符串拆分为丢失字符，然后使用 preggmatch 来计算它是否包含一个大写和符号/数字。
however i did something like this in action script but can't figure out how this is called in php. i cant find a way to put every char of a word in a array.
但是我在动作脚本中做了类似的事情，但无法弄清楚在 php 中是如何调用的。我找不到将单词的每个字符放入数组的方法。
AS3 example
AS3 示例
for(var i:uint = 0; i < thisWordCode.length -1 ; i++)
{
thisWordCodeVerdeeld[i] = thisWordCode.charAt(i);
//trace (thisWordCodeVerdeeld[i]);
}
Thanks, Matthy
谢谢，马蒂
回答by Tom Haigh
You can access characters in strings in the same way as you would access an array index, e.g.
您可以像访问数组索引一样访问字符串中的字符，例如
$length = strlen($string);
$thisWordCodeVerdeeld = array();
for ($i=0; $i<$length; $i++) {
$thisWordCodeVerdeeld[$i] = $string[$i];
}
You could also do:
你也可以这样做：
$thisWordCodeVerdeeld = str_split($string);
However you might find it is easier to validate the string as a whole string, e.g. using regular expressions.
但是，您可能会发现将字符串作为整个字符串进行验证会更容易，例如使用正则表达式。
回答by Kiyan
回答by Greg
You can access a string using [], as you do for arrays:
您可以像访问[]数组一样使用 访问字符串：
$stringLength = strlen($str);
for ($i = 0; $i < $stringLength; $i++)
$char = $str[$i];
回答by Danijel
Since str_split()function is not multibyte safe, an easy solution to split UTF-8 encoded string is to use preg_split()with u (PCRE_UTF8)modifier.
由于str_split()函数不是多字节安全的，拆分 UTF-8 编码字符串的一个简单解决方案是使用preg_split()withu (PCRE_UTF8)修饰符。
preg_split( '//u', $str, null, PREG_SPLIT_NO_EMPTY )
回答by Technomad
A less readable, but better performing solution, when iterating over many strings, might be using issetto check the end of the string. This might be better performing because issetis a language construct and strlenis a function:
当迭代多个字符串时，可读性较差但性能更好的解决方案可能isset用于检查字符串的结尾。这可能会更好地执行，因为它isset是一种语言结构并且strlen是一个函数：
for ($i = 0; isset($value[$i]); $i++) {
"do something here"
}
This questionshould provide more background.
这个问题应该提供更多的背景。
