Sanitize Floats

Created: November-22, 2018

刪除除數字，+ - 和可選 .EE 之外的所有字元。

var_dump(filter_var(1, FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var(1.0, FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var(1.0000, FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var(1.00001, FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1.0', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1.0000', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1.00001', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1,000', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1,000.0', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1,000.0000', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1,000.00001', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('1.8281e-009', FILTER_SANITIZE_NUMBER_FLOAT));

結果：

string(1) "1"
string(1) "1"
string(1) "1"
string(6) "100001"
string(1) "1"
string(2) "10"
string(5) "10000"
string(6) "100001"
string(4) "1000"
string(5) "10000"
string(8) "10000000"
string(9) "100000001"
string(9) "18281-009"

使用 FILTER_FLAG_ALLOW_THOUSAND 選項：

var_dump(filter_var(1, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var(1.0, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var(1.0000, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var(1.00001, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1.0', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1.0000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1.00001', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1,000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1,000.0', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1,000.0000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1,000.00001', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));
var_dump(filter_var('1.8281e-009', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_THOUSAND));

結果：

string(1) "1"
string(1) "1"
string(6) "100001"
string(1) "1"
string(2) "10"
string(5) "10000"
string(6) "100001"
string(5) "1,000"
string(6) "1,0000"
string(9) "1,0000000"
string(10) "1,00000001"
string(9) "18281-009"

使用 FILTER_FLAG_ALLOW_SCIENTIFIC 選項：

var_dump(filter_var(1, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var(1.0, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var(1.0000, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var(1.00001, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1.0', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1.0000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1.00001', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1,000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1,000.0', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1,000.0000', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1,000.00001', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));
var_dump(filter_var('1.8281e-009', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_SCIENTIFIC));

結果：

string(1) "1"
string(1) "1"
string(1) "1"
string(6) "100001"
string(1) "1"
string(2) "10"
string(5) "10000"
string(6) "100001"
string(4) "1000"
string(5) "10000"
string(8) "10000000"
string(9) "100000001"
string(10) "18281e-009"