PHP extension summary

: This article mainly introduces the PHP extension summary. if you are interested in the PHP Tutorial, you can refer to it. Macro definition of thread security

TSRM/TSRM. the hfile has the following definitions # define TSRMLS_FETCH () void *** tsrm_ls = (void ***) ts_resource_ex (0, NULL) # define interval *** tsrm_ls # define TSRMLS_DC, TSRMLS_D # define TSRMLS_Ctsrm_ls # define TSRMLS_CC, TSRMLS_C

1. add TSRMLS_D or TSRMLS_DC (with parameters) to the method definition)
2. when calling a method (real parameter), use TSRMLS_C or TSRMLS_CC (with parameters)
Variable-related macros (partial)

SG-> SAPI Global SAPI information (main/SAPI. h) EG-> Executor Global execution information (zend/zend_globals_macros.h: 43) PG-> PHP Core Global mainly stores php. information in ini: PHP global variables. Php. ini maps one or more global structures of PHP. (Main/php_globals.h) FG-> File Global variable. Data streams of most file I/O or related global variables are inserted into the standard extended exit structure. (Ext/standard/file. h) CG-> Complier Global compile-time information, including function table (zend_globals_macros.h: 32) used to access core Global variables. (Zend/zend_globals_macros.h)

File macro:

Getcwd () VCWD_GETCWD () fopen () VCWD_FOPENopen () VCWD_OPEN () // open () VCWD_OPEN_MODE () for two parameter versions // open () VCWD_OPEN_MODE () for three parameters () version creat () VCWD_CREAT () chdir () VCWD_CHDIR () getwd () VCWD_GETWD () realpath () VCWD_REALPATH () rename () VCWD_RENAME () stat () VCWD_STAT () lstat () round () unlink () VCWD_UNLINK () mkdir () VCWD_MKDIR () rmdir () VCWD_RMDIR () opendir () VCWD_OPENDIR () popen () VCWD_POPEN () access () VCWD_ACCESS () utime () VCWD_UTIME () chmod () VCWD_CHMOD () chown () VCWD_CHOWN ()

Global variables:

# Php-fpm generates POST | GET | COOKIE | SERVER | ENV | REQUEST | file global variable process php_cgi_startup ()-> php_module_startup ()-> php_startup_auto_globals () -> save the variable to the symbol_table symbol table php_cgi_startup (). In fpm/fpm_main.c, define php_module_startup () in main/main. define php_startup_auto_globals () in main/php_variables.h define zend_hash_update (& EG (symbol_table), "_ GET", sizeof ("_ GET") + 1, & vars, sizeof (zval *), NULL);/* read $ _ SERVER variable */static PHP_FUNCTION (print_server_vars) {zval ** val; if (zend_hash_find (& EG (symbol_table), "_ SERVER", sizeof ("_ SERVER"), (void **) & val) = SUCCESS) {RETURN_ZVAL (* val, 1, 0);} else {RETURN_FALSE ;}} /* read $ _ SERVER [$ name] */outputs (print_server_var_arginfo, 0) ZEND_ARG_INFO (0, "name") ZEND_END_ARG_INFO () static PHP_FUNCTION (print_server_var) {char * name; int name_len; zval ** val; HashTable * ht _ Vars = NULL; HashPosition pos; zval ** ret_val; if (zend_parse_parameters (ZEND_NUM_ARGS () TSRMLS_CC, "| s! ", & Name, & name_len) = FAILURE) {RETURN_NULL ();} if (zend_hash_find (& EG (symbol_table)," _ SERVER ", sizeof ("_ SERVER"), (void **) & val) = SUCCESS) {ht_vars = Z_ARRVAL_PP (val ); // enter a value greater than name length + 1, because the string value must be '\ 0' if (zend_hash_find (ht_vars, name, name_len + 1, (void **) & ret_val) = SUCCESS) {RETURN_STRING (Z_STRVAL_PP (ret_val), 0) ;}else {RETURN_NULL () ;}} else {RETURN_NULL ();}}

Third-party library packaging:

SEARCH_PATH = "/usr/local/usr" # SEARCH_FOR = "/include/curl. h "# lib header file path if test-r $ PHP_LIBS/$ SEARCH_FOR; then LIBS_DIR = $ PHP_LIBSelse # search default path list AC_MSG_CHECKING ([for libs files in default path]) for I in $ SEARCH_PATH; do if test-r $ I/$ SEARCH_FOR; then LIBS_DIR = $ I # path of the searched lib AC_MSG_RESULT (found in $ I) fi donefi/* verify whether lib exists */if test-z "$ LIBS_DIR"; then AC_MSG_RESULT ([not found]) AC_MSG_ERROR ([Please reinstall the libs distribution]) fi/* Add the include directory of lib during compilation,-I/usr/include */PHP_ADD_INCLUDE ($ LIBS_DIR/include) LIBNAME = curl # lib name LIBSYMBOL = curl_version # a function of lib for PHP_CHECK_LIBRARY to verify lib/* to verify lib */PHP_CHECK_LIBRARY ($ LIBNAME, $ LIBSYMBOL, [PHP_ADD_LIBRARY_WITH_PATH ($ LIBNAME, $ LIBS_DIR/$ PHP_LIBDIR, LIBS_SHARED_LIBADD) # link lib,-llibcurl AC_DEFINE (HAVE_LIBSLIB, 1, [])], [AC_MSG_ERROR ([wrong libs lib version or lib not found])], [-L $ LIBS_DIR/$ PHP_LIBDIR-lm]) PHP_SUBST (LIBS_SHARED_LIBADD)

Traverse the array:

function hello_array_strings($arr) {    if (!is_array($arr)) return NULL;    printf("The array passed contains %d elements ", count($arr));     foreach($arr as $data) {        if (is_string($data)) echo "$data ";    }}

PHP_FUNCTION(hello_array_strings){    zval *arr, **data;    HashTable *arr_hash;    HashPosition pointer;    int array_count;     if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a", &arr) == FAILURE) {        RETURN_NULL();    }     arr_hash = Z_ARRVAL_P(arr);    array_count = zend_hash_num_elements(arr_hash);    php_printf("The array passed contains %d elements ", array_count);     for(zend_hash_internal_pointer_reset_ex(arr_hash, &pointer); zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS; zend_hash_move_forward_ex(arr_hash, &pointer)) {        if (Z_TYPE_PP(data) == IS_STRING) {             PHPWRITE(Z_STRVAL_PP(data), Z_STRLEN_PP(data));             php_printf(" ");         }    }     RETURN_TRUE;}

Output:

int php_printf(const char *format, ...);int php_write(void *buf, uint size TSRMLS_DC);int PHPWRITE(void *buf, uint size);void php_html_puts(const char *buf, uint size TSRMLS_DC)//print zvalZEND_API int zend_print_zval(zval *expr, int indent);ZEND_API void zend_print_zval_r(zval *expr, int indent TSRMLS_DC);//sprintfPHPAPI int spprintf( char **pbuf, size_t max_len, const char *format, ...);PHPAPI int vspprintf(char **pbuf, size_t max_len, const char *format, va_list ap);//string strcatZEND_API int add_char_to_string(zval *result, const zval *op1, const zval *op2);ZEND_API int add_string_to_string(zval *result, const zval *op1, const zval *op2);ZEND_API int concat_function(zval *result, zval *op1, zval *op2 TSRMLS_DC);ZEND_API void zend_str_tolower(char *str, unsigned int length);ZEND_API char *zend_str_tolower_copy(char *dest, const char *source, unsigned int length);ZEND_API char *zend_str_tolower_dup(const char *source, unsigned int length);

Memory allocation:

emalloc(size_t size);efree(void *ptr);ecalloc(size_t nmemb, size_t size);erealloc(void *ptr, size_t size);estrdup(const char *s);estrndup(const char *s, unsigned int length);

The above section introduces the PHP extension summary, including some content, and hopes to help those who are interested in the PHP Tutorial.