Extensions ext(extension),它是扩展PHP内核功能的一种方式,分为PHP扩展与zend扩展,都支持用户自定义开发,这两种都比较常见,PHP扩展有gd、json、date、array等,而我们熟知的opcache就是Zend扩展。 TSRM TSRM(Thread Safe Resource Manager)线程安全资源管理器。 全局变量就是定义在函数外的变量,它属于公共资源,在多线...
those variables have a specific type attached to hem. They can be a string, a number, an array, an object or something else. Examples of such statically-typed languages are C and pascal. Variables in PHP do not have this specific restraint. They can be a string in one line, ...
Comparison with plain array, ArrayIterator and ArrayObject:<?php$array1 = [1 => 'a', 2 => 'b'];$array2 = [1 => 'a', 2 => 'b'];$array3 = [1 => 'a', 2 => 'b'];foreach ($array1 as &$value) {$value .= 'x';}$iterator2 = new ArrayIterator($array2);foreach...
Among other errors, it intends to increase the size of the arrays, but always initialize a 20 elements SplFixedArray.On a PHP 5.4 64 bits linux server, I found SplFixedArray to be always faster than array().* small data (1,000): * write: SplFixedArray is 15 % faster * read: ...
a 函数说明 abs 绝对值 acos 反余弦 acosh 反双曲余弦 addcslashes 以 C 语言风格使用反斜线转义字符串中的字符 addslashes 使用反斜线引用字符串 apache_child_terminate 在本次请求结束后终止 apache 子进程 apache_geten
GD: Fixed GH-16776 (imagecreatefromstring overflow). GMP: Fixed bug GH-16890 (array_sum() with GMP can loose precision (LLP64)). Hash: Fixed GH-16711: Segfault in mhash(). Opcache: Fixed bug GH-16851 (JIT_G(enabled) not set correctly on other threads). Fixed bug GH-16902 (Set...
// create a Location object for the center point $centerPoint = array( 'Latitude' => $centerLat, 'Longitude' => $centerLon ); // want to calculate the distance in km along the center latitude between the two longitudes $meanDistanceX = haversineDistance($centerLat, $minLon, $...
Check for sanity with array accesses. Check for type safety on binary operations. Check for valid and type safe return values on methods, functions, and closures. Check for No-Ops on arrays, closures, constants, properties, variables, unary operators, and binary operators. ...
The rest of the array elements (e.g. 'maxlength') in an input specification are rendered as HTML element attributes when the input field is rendered. The buttons property is configured similarly. If you're going to use AJAX and/or client form validation with the enabled error summary you...
auth (string, or an array with one or two elements): used to authenticate with the server prior to sending commands. database (integer): selects a different database. Sessions have a lifetime expressed in seconds and stored in the INI variable "session.gc_maxlifetime". You can change it...