33 lines
600 B
Markdown
33 lines
600 B
Markdown
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# thinkphp6 常用的一些扩展类库
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基于PHP7.1+
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> 以下类库都在`\\think\\helper`命名空间下
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## Str
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> 字符串操作
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```
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// 检查字符串中是否包含某些字符串
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Str::contains($haystack, $needles)
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// 检查字符串是否以某些字符串结尾
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Str::endsWith($haystack, $needles)
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// 获取指定长度的随机字母数字组合的字符串
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Str::random($length = 16)
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// 字符串转小写
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Str::lower($value)
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// 字符串转大写
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Str::upper($value)
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// 获取字符串的长度
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Str::length($value)
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// 截取字符串
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Str::substr($string, $start, $length = null)
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```
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