PHP 7.4.18

What's new in this version:

Core:
- Fixed (Error handler that throws ErrorException infinite loop)
- Fixed (Flushing streams with compression filter is broken). (cmb) 04 Mar 2021, php 7.4.16
- Fixed #80706 (mail(): Headers after Bcc headers may be ignored)

Dba:
- Fixed (dba_popen() may cause segfault during RSHUTDOWN)

DOM:
- Fixed (UAF when appending DOMDocument to element)

FPM:
- Fixed (Duplication of info about inherited socket after pool removing)

FTP:
- Fixed (SSL_read on shutdown, ftp/proc_open)

Imap:
- Fixed (imap_mail_compose() header injection)

Intl:
- Fixed (msgfmt_format() does not accept DateTime references)

LibXML:
- Fixed (simplexml_load_file() doesn't use HTTP headers)
- Fixed (Invalid memory access in php_libxml_xmlCheckUTF8)

MySQLnd:
- Fixed (SegFault when disabling ATTR_EMULATE_PREPARES and MySQL 8.0)
- Fixed (Calling stmt_store_result after fetch doesn't throw an error)
- Fixed (mysqlnd's mysql_clear_password does not transmit null-terminated password)

Opcache:
- Fixed (create simple class and get error in opcache.so)
- Fixed (Variables become null in if statements)

Pcntl:
- Fixed (Potential integer overflow in pcntl_exec())

PCRE:
- Fixed (preg_split ignores limit flag when pattern with K has 0-width fullstring match)

PDO_ODBC:
- Fixed (PDO ODBC truncates BLOB records at every 256th byte)

PDO_pgsql:
- Fixed (PDO::PARAM_INT is treated the same as PDO::PARAM_STR)

phpdbg:
- Fixed (Exit code is 0 when could not open file)

Session:
- Fixed (session_name() problem with backslash)
- Fixed (Cannot set save handler when save_handler is invalid)

SOAP:
- Fixed (SOAP special XML characters in namespace URIs not encoded)

Standard:
- Fixed (http wrapper silently ignores long Location headers)
- Fixed (phpinfo(INFO_CREDITS) displays nothing in CLI)
- Fixed (HTTP wrapper waits for HTTP 1 response after HTTP 101)
- Fixed (Taking a reference to $_SERVER hides its values from phpinfo())
- Fixed (file_get_contents() maxlen fails above (2**31)-1 bytes)

MySQLi:
- Fixed (x() and y() truncating floats to integers)

OPcache:
- Fixed (opcache doesn't honour pcre.jit option)

OpenSSL:
- Fixed (Providing RSA key size < 512 generates key that crash PHP)

Phar:
- Fixed (Unclear error message wrt. __halt_compiler() w/o semicolon) (cmb)
- Fixed (Phar does not mark UTF-8 filenames in ZIP archives)
- Fixed (Phar cannot compress large archives)

SPL:
- Fixed bug#80719 (Iterating after failed ArrayObject::setIteratorClass() causes Segmentation fault)

Zip:
- Fixed (Fix for bug 79296 should be based on runtime version)