检查字符串是否包含2个空格（但不是一个接一个）[关闭]

How would You check if string contains exactly 2 non-adjacent spaces in PHP ?

f.e. 'John Wayne Washington' -> TRUE (2 spaces in string); 'John Wayne' -> FALSE (1 space)

Any regex pattern with explanation ?

$string = "Bush      sucks       big    time";
$counter = count_chars($string,0);
echo $counter[32] . " spaces in the phrase.";

Use this pattern:

^[^ ]* [^ ]+ [^ ]*$

It matches a string with exactly 2 non-adjacent spaces.