函数Abs()
描述：
mixed abs (mixed number);
Returns the absolute value of number. If the argument number is float, return type is also float, otherwise it is int(返回所输的数字的绝对值，浮点型返回浮点型，其他返回整型)
函数Acos()
描述：
float acos (float arg);
Returns the arc cosine of arg in radians(返回角的余弦值)
Adabas D功能
函数ada_afetch()
描述：
fetch a result row into an array(返回结果到一个数组里)
函数ada_autocommit()
描述：
toggle autocommit behaviour
函数ada_close()
描述：
close a connection to an Adabas D server (关掉一个数据库的关联)
函数ada_commit()
描述：
commit a transaction (提交一个处理)
函数ada_connect()
描述：
connect to an Adabas D datasource(联接一个数据库)
函数ada_exec()
描述：
prepare and execute a SQL statement(执行一个SQL语句)
函数ada_fetchrow()
描述：
fetch a row from a result(从数据库中取一条记录)
函数ada_fieldname()
描述：
get the columnname(得到字段名)
函数ada_fieldnum()
描述：
get column number(得到字段的总数)
函数ada_fieldtype()
描述：
get the datatype of a field(取得字段的类型)
函数ada_freeresult()
描述：
free resources associated with a result
函数ada_numfields()
描述：
get the number of columns in a result(在结果中得到字段数目)
函数ada_numrows()
描述：
number of rows in a result(所取结果的记录数)
函数ada_result()
描述：
get data from results(得到结果的数据)
函数ada_resultall()
描述：
print result as HTML table(以HTML的格式输出结果)
函数ada_rollback()
描述：
rollback a transaction
函数apache_lookup_uri()
描述：
Perform a partial request for the specified URI and return all info about it，This performs a partial request for a URI. It goes just far enough to obtain all the important information about the given resource and returns this information in a class. The properties of the returned class are:
status：the_request、status_line、method、content_type、handler
uri：filename、path_info、args、boundary、no_cache、no_local_copy、 allowed、send_bodyct、bytes_sent、byterange、clength、unparsed_uri mtime、request_time
函数apache_note()
描述：
Get and set apache request notes,apache_note() is an Apache-specific function which gets and sets values in a request's notes table. If called with one argument, it returns the current value of note note_name . If called with two arguments, it sets the value of note note_name to note_value and returns the previous value of note note_name .
函数getallheaders()
描述：
Fetch all HTTP request headers(取得所有HTTP头部请求)
例子：
＄headers = getallheaders();
while (list(＄header, ＄value) = each(＄headers)) {
echo "＄header: ＄value
\n";
}
这个例子将显示返回所有最近的头部请求。
注：此函数只支持APACHE下的PHP is an Apache-specific function which is equivalent to in mod_include. It performs an Apache sub-request. It is useful for including CGI scripts or .shtml files, or anything else that you would parse through Apache. Note that for a CGI script, the script must generate valid CGI headers. At the minimum that means it must generate a Content-type header.
函数virtual()
描述：
virtual()
数组函数 example
函数array()
描述：
建立一个数组
array array(...)传回一数组的值，这些值可以用=>来附值。
下面说明了如何构建一个二维数组，及如何指定这个数组的key，以及在正常的数组中以跳序的方式去指定数组的值。
Example 1. array()
＄fruits = array(
"fruits" => array("a"=>"orange","b"=>"banana","c"=>"apple"),
"numbers" => array(1, 2, 3, 4, 5, 6),
"holes" => array("first", 5 => "second", "third")
);
函数array_walk()
描述：
用函数的方式对每个数组的元素做处理
int array_walk (array arr, string func);
使用一个叫FUNC的函数对ARR的每个元素做处理，那些元素将当成是首传给FUNC的参数；如果FUNC需要超过一个参数，则在每次array_walk()呼叫FUNC时都产生一个警告信息，这些警告信息是可以消除的，只要把'@'符号加在array_walk()之前即可。
注意：FUNC会直接对ARR中的元素做处理，所以任何元素的变化将直接改变其在数组中的值。
Example 1. array_walk() example
＄fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
function test_alter( ＄item1 ) { ＄item1 = 'bogus'; }
function test_print( ＄item2 ) { echo "＄item2
\n"; }
array_walk( ＄fruits, 'test_print' );
array_walk( ＄fruits, 'test_alter' );
array_walk( ＄fruits, 'test_print' );
函数arsort()
描述：
以倒序的方式排列一数组但其序数则不变
void arsort (array array);
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. Example 1. arsort() example
＄fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
arsort(＄fruits);
for(reset(＄fruits); ＄key = key(＄fruits); next(＄fruits)) {
echo "fruits[＄key] = ".＄fruits[＄key]."\n";
}
This example would display: fruits[a] = orange fruits[d] = lemon fruits[b] = banana fruits[c] = apple The fruits have been sorted in reverse alphabetical order, and the index associated with each element has been maintained.
函数asort()
描述：
顺序排列一数组且其序数不变
void asort (array array);
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. Example 1. asort() example
＄fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
asort(＄fruits);
for(reset(＄fruits); ＄key = key(＄fruits); next(＄fruits)) {
echo "fruits[＄key] = ".＄fruits[＄key]."\n";
}
This example would display: fruits[c] = apple fruits[b] = banana fruits[d] = lemon fruits[a] = orange The fruits have been sorted in alphabetical order, and the index associated with each element has been maintained.
函数count()
描述：
计算一变量中元素的个数
int count (mixed var);
Returns the number of elements in var , which is typically an array (since anything else will have one element).
Returns 0 if the variable is not set.
Returns 1 if the variable is not an array.
函数current()
描述：
传回数组指针目前所指的元素
mixed current (array array);
Each array variable has an internal pointer that points to one of its elements. In addition, all of the elements in the array are linked by a bidirectional linked list for traversing purposes. The internal pointer points to the first element that was inserted to the array until you run one of the functions that modify that pointer on that array.
The current() function simply returns the array element that's currently being pointed by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list, current() returns false.
函数each()
描述：
返回数组中下一对key/value的值
array each (array array);
Returns the current key/value pair from the array array and advances the array cursor. This pair is returned in a four-element array, with the keys 0 , 1 , key , and value . Elements 0 and key each contain the key name of the array element, and 1 and value contain the data.
Example 1. each() examples
＄foo = array( "bob", "fred", "jussi", "jouni" ); ＄bar = each( ＄foo );
＄bar now contains the following key/value pairs:
0 => 0
1 => 'bob'
key => 0
value => 'bob'
＄foo = array( "Robert" => "Bob", "Seppo" => "Sepi" ); ＄bar = each( ＄foo );
＄bar now contains the following key/value pairs:
0 => 'Robert'
1 => 'Bob'
key => 'Robert'
value => 'Bob'
Example 2. Traversing ＄HTTP_POST_VARS with each()
echo "Values submitted via POST method:<br>";
while ( list( ＄key, ＄val ) = each( ＄HTTP_POST_VARS ) ) {
echo "＄key => ＄val<br>";
}
函数end()
描述：
将数组中的指针移到最后一个
end (array array);
end() advances array 's internal pointer to the last element.
函数key()
描述：
从一数组中取出key
mixed key (array array);
key() returns the index element of the current array position.
函数ksort()
描述：
以key来排列一数组
Example 1. ksort() example
＄fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
ksort(＄fruits);
for(reset(＄fruits);
＄key = key(＄fruits);
next(＄fruits)) { echo "fruits[＄key] = ".＄fruits[＄key]."\n"; }
This example would display: fruits[a] = orange fruits[b] = banana fruits[c] = apple fruits[d] = lemon
函数list()
描述：
用类似数组的方式去指定一整串变量的值
Example 1. list() example
<table> <tr> <th> Employee name</th>
<th>Salary</th> </tr>
<?php ＄result = mysql(＄conn, "SELECT id, name, salary FROM employees");
while (list(＄id, ＄name, ＄salary) = mysql_fetch_row(＄result)) {
print(" <tr>\n"."<td><a href=\"info.php3?id=＄id\">＄name</a></td>\n"."<td>＄salary</td>\n"." </tr>\n");
}
?>
</table>
函数next()
描述：
将数组的指向指到下一组数据
函数pos()
描述：
传回数组的当前的数据
函数prev()
描述：
传回数组的前一条的数据
函数reset()
描述：
数组的指针指到第一条
函数rsort ()
描述：
以倒序方式排列一个数组
Example 1. rsort() example
＄fruits = array("lemon","orange","banana","apple");
rsort(＄fruits);
for(reset(＄fruits); (＄key,＄value) = each(＄fruits); ) {
echo "fruits[＄key] = ".＄value."\n";
}
This example would display: fruits[0] = orange fruits[1] = lemon fruits[2] = banana fruits[3] = apple The fruits have been sorted in reverse alphabetical order.
函数sizeof()
描述：
取得一个数组的大小和元素的数目
函数sort()
描述：
排序数组
Example 1. sort() example
＄fruits = array("lemon","orange","banana","apple");
sort(＄fruits);
for(reset(＄fruits);
＄key = key(＄fruits);
next(＄fruits)) {
echo "fruits[＄key] = ".＄fruits[＄key]."\n";
}
This example would display: fruits[0] = apple fruits[1] = banana fruits[2] = lemon fruits[3] = orange The fruits have been sorted in alphabetical order.
函数uasort()
描述：
以自定义的方式排列一个数组且序列不变。
函数uksort()
描述：
以自定义的方式以key排列
This function will sort the keys of an array using a user-supplied comparison function. If the array you wish to sort needs to be sorted by some non-trivial criteria, you should use this function. Example 1. uksort() example
function mycompare(＄a, ＄b) {
if (＄a == ＄b) return 0;
return (＄a > ＄b) ? -1 : 1;
}
＄a = array(4 => "four", 3 => "three", 20 => "twenty", 10 => "ten");
uksort(＄a, mycompare);
while(list(＄key, ＄value) = each(＄a)) {
echo "＄key: ＄value\n";
}
This example would display: 20: twenty 10: ten 4: four 3: three
函数usort()
描述：
以自定义的方式以value排列
void usort (array array, function cmp_function);
This function will sort an array by its values using a user-supplied comparison function. If the array you wish to sort needs to be sorted by some non-trivial criteria, you should use this function. Example 1. usort() example
function cmp(＄a,＄b) {
if (＄a == ＄b) return 0;
return (＄a > ＄b) ? -1 : 1;
}
＄a = array(3,2,5,6,1);
usort(＄a, cmp);
while(list(＄key,＄value) = each(＄a)) {
echo "＄key: ＄value\n";
}
This example would display: 0: 6 1: 5 2: 3 3: 2 4: 1 Obviously in this trivial case the rsort() function would be more appropriate.
BC (Arbitrary Precision) Functions
函数bcadd()
描述：
Add two arbitrary precision numbers
string bcadd (string left operand, string right operand, int [ scale ]); 左面的字符加右面的字符，返回一个字符。
函数bccomp()
描述：
int bccomp (string left operand, string right operand, int [ scale ]);
左面的字符和右面的字符进行比较，如果相等的话返回0，如果左面的比右面的长返回+1，右面的比左面的长返回-1
函数bcdiv()
描述：
Divide two arbitrary precision numbers
string bcdiv (string left operand, string right operand, int [ scale ]); 将左面的字符串以右面的字符串为标准分开
函数bcmod()
描述：
Get modulus of an arbitrary precision number
string bcmod (string left operand, string modulus);
用右面的modulus操作左面的字符串
函数bcmul()
描述：
Multiply two arbitrary precision number
string bcmul (string left operand, string right operand, int [ scale ]);
Multiply the left operand by the right operand and returns the result. The optional scale sets the number of digits
after the decimal place in the result.
函数bcpow()
描述：
Raise an arbitrary precision number to another.
Raise x to the power y . The scale can be used to set the number of digits after the decimal place in the result.
函数bcscale()
描述：
Set default scale parameter for all bc math functions.
string bcscale (int scale);
This function sets the default scale parameter for all subsequent bc math functions that do not explicitly specify a scale
parameter
函数bcsqrt()
描述；
string bcsqrt (string operand, int scale);
返回字符的平方根
函数bcsub()
描述：
string bcsub (string left operand, string right operand, int [ scale ]);
将右面的字符减去左面的字符
Calendar Functions日历功能
函数JDToGregorian()
描述：
string jdtogregorian (int julianday);
将Julian日历转换成Gregorian日历
函数GregorianToJD()
描述：
int gregoriantojd (int month, int day, int year);
将Gregorian日历转换成Julian日历
函数JDToJulian ()
描述：
string jdtojulian (int julianday);
将Julian Calendar转换Julian Day
函数JulianToJD ()
描述：
int juliantojd (int month, int day, int year);
函数JDToJewish ()
描述：
Converts a Julian Day Count to the Jewish Calendar
string jdtojewish (int julianday);
函数JewishToJD()
描述：
Converts a date in the Jewish Calendar to Julian Day Count
int jewishtojd (int month, int day, int year);
函数JDToFrench()
描述：
Converts a Julian Day Count to the French Republican Calendar
string jdtofrench (int month, int day, int year);
函数FrenchToJD()
描述：
Converts a date from the French Republican Calendar to a Julian Day Count int frenchtojd (int month, int day, int year);
函数JDMonthName ()
描述：
Returns a month name
string jdmonthname (int julianday, int mode);
Mode Meaning
0 Gregorian - apreviated
1 Gregorian
2 Julian - apreviated
3 Julian
4 Jewish
5 French Republican
函数JDDayOfWeek ()
描述：
Returns the day of the week
mixed jddayofweek (int julianday, int mode);
Mode Meaning
0 returns the day number as an int (0=sunday, 1=monday, etc)
1 returns string containing the day of week (english-gregorian)
2 returns a string containing the abreviated day of week (english-gregorian)
