如何使用preg_match检查我的字符串是否包含空格？

Question

i use this code in php to detect if the string contains characters other than a-z,A-Z,0-9. I want to check if the string contains any spaces. What should I add to the pattern?

if (preg_match ('/[^a-zA-Z0-9]/i', $getmail)) {
    // The string contains characters other than a-z and A-Z and 0-9
}

Answer 1

If you want to add space to your current pattern, you actually need to input space in your pattern:

/[^a-z0-9 ]/i
         ^
      Notice the space there

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