JSON is the modern data format used in "AJAX" applications. As the leading language for the Web PHP course has support for handling JSON data: You can pass any data to json_enco...

== is_equal_function -> compare_function != is_not_equal_function -> compare_function === is_identical_function !== is_not_identical_function -> is_identical_function >= ,<= is_...

2 . ===(调用is_identical_function)，!==(调用is_not_identical_function -> is_identical_function ) <?php $i = 1; $j = 1.0; echo $i === $j; //opcode line # * op ...

php版本 PHP 5.3.14 1. ==(调用is_equal_function->compare_function ),!=(调用is_not_equal_function->compare_function) <?php $i = 1; $j = 1.0; echo $i == $j; //opcode line # * ...

As of PHP 5.3 web developers can use a wonderful feature of the language, the __invoke() magic method. This enables PHP to provide the Closure class and based on it the ability ...

通过对函数实现的原理分析和性能测试，我们总结出以下一些结论： PHP的函数调用开销相对较大。 函数相关信息保存在一个大的hash_table中，每次调用时通过函数名在hash表中查找，因此函数名长...

count count是我们经常用到的一个函数，其功能是返回一个数组的长度。 count这个函数，其复杂度是多少呢？一种常见的说法是count函数会遍历整个数组然后求出元素个数，因此复杂度是O(n)。那实...

常量的内部结构 Zend/zend_constants.h typedef struct _zend_constant {    zval value; /* zval结构，PHP内部变量的存储结构 */    int flags; /* 常量的标记如 CONST_PERSISTENT |...

#define php_memnstr zend_memnstr //在haystack中查找needle,如果不存在返回null,如果存在，返回指向haystack中needle头字符的指针 //needle_len needle指向的字符串长度 //end haysta...

sapi_module_struct.startup static int php_cli_startup(sapi_module_struct *sapi_module) /* {{{ */ { if (php_module_startup(sapi_module, NULL, 0)==FAILURE) { return F...

#define PHP_FUNCTION ZEND_FUNCTION #define ZEND_FUNCTION(name) ZEND_NAMED_FUNCTION( ZEND_FN(name) ) #define ZEND_FN(name) zif_##name #define ZEND_NAMED_FUNCTION(name) void name(...

Did you know that inserting 2^16 = 65536 specially crafted values into a normal PHP array can take 30 seconds? Normally this would take only 0.01 seconds. This is the code to re...