## 32位系统, 编译php实现支持大于4G文件

1、下载最新php源代码(推荐php7.4)，下载命令：
`git clone -b php-7.4.28 --depth=5  https://github.com/php/php-src`


diff 代码如下

```
diff --git a/Zend/zend_long.h b/Zend/zend_long.h
@@ -40,7 +40,7 @@ typedef int64_t zend_off_t;
 #else
 typedef int32_t zend_long;
 typedef uint32_t zend_ulong;
-typedef int32_t zend_off_t;
+typedef int64_t zend_off_t;
 # define ZEND_LONG_MAX INT32_MAX
 # define ZEND_LONG_MIN INT32_MIN
 # define ZEND_ULONG_MAX UINT32_MAX
diff --git a/ext/standard/file.c b/ext/standard/file.c
@@ -1265,7 +1265,7 @@ PHPAPI PHP_FUNCTION(rewind)
 PHPAPI PHP_FUNCTION(ftell)
 {
 	zval *res;
-	zend_long ret;
+	double ret;
 	php_stream *stream;
 
 	ZEND_PARSE_PARAMETERS_START(1, 1)
@@ -1278,7 +1278,7 @@ PHPAPI PHP_FUNCTION(ftell)
 	if (ret == -1)	{
 		RETURN_FALSE;
 	}
-	RETURN_LONG(ret);
+	RETURN_DOUBLE(ret);
 }
 /* }}} */
 
@@ -1287,12 +1287,13 @@ PHPAPI PHP_FUNCTION(ftell)
 PHPAPI PHP_FUNCTION(fseek)
 {
 	zval *res;
-	zend_long offset, whence = SEEK_SET;
+	zend_long whence = SEEK_SET;
+	double offset;
 	php_stream *stream;
 
 	ZEND_PARSE_PARAMETERS_START(2, 3)
 		Z_PARAM_RESOURCE(res)
-		Z_PARAM_LONG(offset)
+		Z_PARAM_DOUBLE(offset)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_LONG(whence)
 	ZEND_PARSE_PARAMETERS_END_EX(RETURN_FALSE);
@@ -1592,7 +1593,7 @@ PHP_NAMED_FUNCTION(php_if_fstat)
 #else
 	ZVAL_LONG(&stat_rdev, -1);
 #endif
-	ZVAL_LONG(&stat_size, stat_ssb.sb.st_size);
+	ZVAL_DOUBLE(&stat_size, stat_ssb.sb.st_size);
 	ZVAL_LONG(&stat_atime, stat_ssb.sb.st_atime);
 	ZVAL_LONG(&stat_mtime, stat_ssb.sb.st_mtime);
 	ZVAL_LONG(&stat_ctime, stat_ssb.sb.st_ctime);
diff --git a/ext/standard/filestat.c b/ext/standard/filestat.c
@@ -879,7 +879,7 @@ PHPAPI void php_stat(const char *filename, size_t filename_length, int type, zva
 	case FS_INODE:
 		RETURN_LONG((zend_long)ssb.sb.st_ino);
 	case FS_SIZE:
-		RETURN_LONG((zend_long)ssb.sb.st_size);
+		RETURN_DOUBLE((double)ssb.sb.st_size);
 	case FS_OWNER:
 		RETURN_LONG((zend_long)ssb.sb.st_uid);
 	case FS_GROUP:
@@ -936,7 +936,7 @@ PHPAPI void php_stat(const char *filename, size_t filename_length, int type, zva
 #else
 		ZVAL_LONG(&stat_rdev, -1);
 #endif
-		ZVAL_LONG(&stat_size, stat_sb->st_size);
+		ZVAL_DOUBLE(&stat_size, stat_sb->st_size);
 		ZVAL_LONG(&stat_atime, stat_sb->st_atime);
 		ZVAL_LONG(&stat_mtime, stat_sb->st_mtime);
 		ZVAL_LONG(&stat_ctime, stat_sb->st_ctime);

```