浅谈PHP源码二十七：PHP对构造方法的识别

<?php
class Foo {     
public function Foo() {     
}     
private function __construct() {     
}
} 
new Foo();
die();

 spl_iterators.c 3228行 REGISTER_SPL_STD_CLASS_EX(IteratorIterator, spl_dual_it_new, spl_funcs_IteratorIterator);///spl_functions.h 31行#define REGISTER_SPL_STD_CLASS_EX(class_name, obj_ctor, funcs) \
spl_register_std_class(&spl_ce_ ## class_name, # class_name, obj_ctor, funcs TSRMLS_CC);//spl_functions.c 41行PHPAPI void spl_register_std_class(zend_class_entry ** ppce, char * class_name, void * obj_ctor, const zend_function_entry * function_list TSRMLS_DC) //spl_functions.c 2235行ZEND_API zend_class_entry *zend_register_internal_class(zend_class_entry *orig_class_entry TSRMLS_DC) /* {{{ *///调用do_register_internal_class函数 //zend_API.c 2169行static zend_class_entry *do_register_internal_class(zend_class_entry *orig_class_entry, zend_uint ce_flags TSRMLS_DC) /* {{{ *///调用zend_register_functions(class_entry, class_entry->builtin_functions, &class_entry->function_table, MODULE_PERSISTENT TSRMLS_CC); //zend_API.c 1795行/* Look for ctor, dtor, clone
* If it's an old-style constructor, store it only if we don't have
* a constructor already.
*/if ((fname_len == class_name_len) && !memcmp(lowercase_name, lc_class_name, class_name_len+1) && !ctor) {
ctor = reg_function;} else if ((fname_len == sizeof(ZEND_CONSTRUCTOR_FUNC_NAME)-1) && !memcmp(lowercase_name, ZEND_CONSTRUCTOR_FUNC_NAME, sizeof(ZEND_CONSTRUCTOR_FUNC_NAME))) {
ctor = reg_function;}  
scope->constructor = ctor;//在1961行 确认构造函数

<?php
class Foo {     
public function Foo() {
        echo 'Foo';
    }     public function __construct() {
        echo '__construct';
    }} 
    $foo = new Foo();
    $foo->Foo();