---
name: "pcre2_substring_free"
section: "3"
platform: "linux"
package: "pcre2"
version: "10.49-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/pcre2_substring_free"
---

# pcre2\_substring\_free(3)

Perl-compatible regular expressions (revised API)

## NAME

PCRE2 - Perl-compatible regular expressions (revised API)

## SYNOPSIS

**#include \<pcre2.h\>**

```
void pcre2_substring_free(PCRE2_UCHAR *buffer);
```

## DESCRIPTION

This is a convenience function for freeing the memory obtained by a previous call to **pcre2\_substring\_get\_byname()** or **pcre2\_substring\_get\_bynumber()**. Its only argument is a pointer to the string. If the argument is NULL, the function does nothing.

There is a complete description of the PCRE2 native API in the **pcre2api** page and a description of the POSIX API in the **pcre2posix** page.