PHP 验证数字是否有效

2024-04-12 10:02:03 484

示例

将值验证为float，并在成功时转换为float。

var_dump(filter_var(1, FILTER_VALIDATE_FLOAT)); var_dump(filter_var(1.0, FILTER_VALIDATE_FLOAT)); var_dump(filter_var(1.0000, FILTER_VALIDATE_FLOAT)); var_dump(filter_var(1.00001, FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1.0', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1.0000', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1.00001', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1,000', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1,000.0', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1,000.0000', FILTER_VALIDATE_FLOAT)); var_dump(filter_var('1,000.00001', FILTER_VALIDATE_FLOAT)); var_dump(filter_var(1, FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var(1.0, FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var(1.0000, FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var(1.00001, FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1.0', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1.0000', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1.00001', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1,000', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1,000.0', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1,000.0000', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND)); var_dump(filter_var('1,000.00001', FILTER_VALIDATE_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));

结果

float(1) float(1) float(1) float(1.00001) float(1) float(1) float(1) float(1.00001) bool(false) bool(false) bool(false) bool(false) float(1) float(1) float(1) float(1.00001) float(1) float(1) float(1) float(1.00001) float(1000) float(1000) float(1000) float(1000.00001)

PHP 验证数字是否有效

示例

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