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str_to_numeric

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

namespace HH;

function str_to_numeric(
  string $str,
): ?num;

Parameters​

  • string $str - The input string

Returns​

  • ?num - - If $str is not "numeric" as per the definition of str_number_coercible null is returned. Otherwise, return the value of the string coerced to a number