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PHP Manual Migrating from PHP 8.4.x to PHP 8.5.x New Features New Classes and Interfaces New Functions New Global Constants Backward Incompatible Changes Deprecated Features Other Changes Windows Support   New Functions Backward Incompatible Changes Migrating from PHP 8.4.x to PHP 8.5.x Last updated: Mon, 26 Oct 2026 New Global Constants Core PHP_BUILD_DATE PHP_BUILD_PROVIDER cURL CURLINFO_USED_PROXY CURLINFO_HTTPAUTH_USED CURLINFO_PROXYAUTH_USED CURLINFO_CONN_ID CURLINFO_QUEUE_TIME_T CURLOPT_INFILESIZE_LARGE CURLFOLLOW_ALL CURLFOLLOW_OBEYCODE CURLFOLLOW_FIRSTONLY Filter FILTER_THROW_ON_FAILURE Intl DECIMAL_COMPACT_SHORT DECIMAL_COMPACT_LONG OpenSSL OPENSSL_PKCS1_PSS_PADDING PKCS7_NOSMIMECAP PKCS7_CRLFEOL PKCS7_NOCRL PKCS7_NO_DUAL_CONTENT POSIX POSIX_SC_OPEN_MAX Sockets IPPROTO_ICMP IPPROTO_ICMPV6 TCP_FUNCTION_BLK (FreeBSD only) TCP_FUNCTION_ALIAS (FreeBSD only) TCP_REUSPORT_LB_NUMA (FreeBSD only) TCP_REUSPORT_LB_NUMA_NODOM (FreeBSD only) TCP_REUSPORT_LB_NUMA_CURDOM (FreeBSD only) TCP_BBR_ALGORITHM (FreeBSD only) AF_PACKET (Linux only) IP_BINDANY (FreeBSD/NetBSD/OpenBSD only) SO_BUSY_POLL (Linux only) UDP_SEGMENT (Linux only) SHUT_RD SHUT_WR SHUT_RDWR Tokenizer T_VOID_CAST T_PIPE Standard IMAGETYPE_HEIF IMAGETYPE_SVG when libxml is loaded. New Functions Backward Incompatible Changes Migrating from PHP 8.4.x to PHP 8.5.x Last updated: Mon, 26 Oct 2026

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