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PHP正则表达式:匹配特定数字

WBOY
WBOYOriginal
2016-06-13 10:39:391316browse

PHP正则表达式:匹配特定数字,常用介绍,希望对大家有所收获。
^[1-9]d*$      //匹配正整数
^-[1-9]d*$      //匹配负整数
^-?[1-9]d*$    //匹配整数
^[1-9]d*|0$     //匹配非负整数(正整数 0)
^-[1-9]d*|0$   //匹配非正整数(负整数 0)
^[1-9]d*.d*|0.d*[1-9]d*$    //匹配正浮点数
^-([1-9]d*.d*|0.d*[1-9]d*)$  //匹配负浮点数
^-?([1-9]d*.d*|0.d*[1-9]d*|0?.0 |0)$    //匹配浮点数
^[1-9]d*.d*|0.d*[1-9]d*|0?.0 |0$       //匹配非负浮点数(正浮点数 0)
^(-([1-9]d*.d*|0.d*[1-9]d*))|0?.0 |0$  //匹配非正浮点数(负浮点数 0)

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