Php regular expression verification number_php tutorial-PHP Tutorial

Php regular expression to verify numbers. Php Tutorial regular expression verification number non-negative floating point number (positive floating point number + 0): ^ d + (. d + )? $ Positive floating point ^ ([0-9] +. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] *. [0-9] +) | ([0-9] * [1-9] [0-9] *) $ regular expression verification numbers in non-php Tutorial

Non-negative floating point number (positive floating point number + 0): ^ d + (. d + )? $
Positive floating point number ^ ([0-9] +. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] *. [0-9] +) | ([0-9] * [1-9] [0-9] *) $
Non-positive floating point number (negative floating point number + 0) ^ (-d + (. d + )?) | (0 + (. 0 + )?)) $
Negative floating point number ^ (-([0-9] +. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] *. [0-9] +) | ([0-9] * [1-9] [0-9] *) $
Floating point number ^ (-? D +) (. d + )?

^ [1-9] d * $

// Match a positive integer

^-[1-9] d * $

// Match a negative integer

^ -? [1-9] d * $

// Match the integer

^ [1-9] d * | 0 $

// Match a non-negative integer (positive integer + 0)

^-[1-9] d * | 0 $

// Match non-positive integers (negative integers + 0)

^ [1-9] d *. d * | 0. d * [1-9] d * $

// Match the positive floating point number

^-([1-9] d *. d * | 0. d * [1-9] d *) $

// Match the negative floating point number

^ -? ([1-9] d *. d * | 0. d * [1-9] d * | 0 ?. 0 + | 0) $

// Match floating point numbers

^ [1-9] d *. d * | 0. d * [1-9] d * | 0 ?. 0 + | 0 $

// Match non-negative floating point number (positive floating point number + 0)

^ (-([1-9] d *. d * | 0. d * [1-9] d *) | 0 ?. 0 + | 0 $

// Match a non-positive floating point number (negative floating point number + 0)

Verification Number: ^ [0-9] * $
Verify the n-digit number: ^ d {n} $
Verify the number of at least n digits: ^ d {n,} $
Verify m-n digits: ^ d {m, n} $
Verify the number starting with zero or zero: ^ (0 | [1-9] [0-9] *) $
Verify the positive number of two decimal places: ^ [0-9] + (. [0-9] {2 })? $
Verify the positive number of 1-3 decimal places: ^ [0-9] + (. [0-9] {1, 3 })? $
Verify a non-zero positive integer: ^ +? [1-9] [0-9] * $
Verify a non-zero negative integer: ^-[1-9] [0-9] * $
Verify non-negative integer (positive integer + 0) ^ d + $
Verify non-positive integer (negative integer + 0) ^ (-d +) | (0 +) $
3 characters for verification: ^. {3} $

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Regularizedregular expression verifies the number non-negative floating point number (positive floating point number + 0): ^ d + (. d + )? $ Positive floating point ^ ([0-9] +. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] *. [0-9] +) | ([0-9] * [1-9] [0-9] *) $ not...