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PHP function quick check

May 05, 2018 am 09:11 AM
phpfunctionquick check

This article mainly introduces the function quick check about php, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

Quick check

字符串 计算  
    1.min()算最小值    
    2.max()算最大值    
    3.ceil()向上取整    
    4.floor()向下取整    
    5.mt_rand()随机数    
    6.trim()删除字符串两边的空格    
    7.rtrim()删除右边的空格别名:chop()    
    8.ltrim()删除左边的空格    
    9.dirname() 从文件路径获取文件夹路径    
    10.str_repeat()生成重复的字符串    
    11.str_split()切割字符串    
    12.strrev()颠倒循序字符串    
    13.wordwrap($str,15)指定15字节换行    
    14.str_shuffle()随机打乱字符串    
    15.parse_str("id=23&name=John%20Adams", $myArray);将url参数转为数组    
    16.number_format()千分位    
    17.strtolower()将字符串转为小写    
    18.strtoupper()将字符串转为大写    
    19.ucfirst()将字符串的首字母大写    
    20.htmlentities()将html代码直接输出    
    21.strip_tags()过滤html    
    22.quotemeta()将特殊字符转义    
    23.substr_count()统计字符串出现次数    
    24.str_replace()字符串替换    
    25.strrchr()字符串截取(最后出现的位置)    
    26.strchr()字符串截取 别名strstr    
    27.stripos()字符串查找    
    28.strpos()字符串查找(区分大写)
    
数组    
    1.array_combine()将一数组作为键将另一数组作为值    
    2.range(): 随机生产数组    
    3.compact('变量名'):生成数组把变量名为键,变量的值为值    
    4.array_chunk()数组拆分    
    5.array_merge()合并数组    
    6.array_slice()数组截取    
    7.array_diff()返回数组不同的值    
    8.array_intersect()返回数组相同的值    
    9.array_search()查找字符串的值    
    10.array_splice()数组中一部分删除用其他值替代    
    11.in_array() 判断数组中是否存在这个值    
    12.array_key_exists()判断数组中是否存在这个键    
    13.array_shift()弹出第一元素并返回    
    14.array_unshif()往前面追加元素    
    15.array_pop()弹出最后一个元素    
    16.array_push()往后面追加一个元素    
    17.shuffle()随机打乱数组    
    18.array_reverse()颠倒数组    
    19.array_flip()键值替换    
    20.array_keys()返回所有键    
    21.array_count_values()统计值的出现次数    
    22.array_unique() 去除重复的值    
    22.array_column($arr, '数组的健','数组的健') 索引数组  第三个参数 使第三个参数的值作为键混合数组    
    23.array_sum() 统计数组所的值    24.assoc_unique() 去重函数
 文件 
    1.fopen() 打开文件    
    2.fclose()关闭文件    
    3.file_exists() 判断文件是否存在    
    4.filesize() 获取文件大小    
    5.is_readable()判读文件是否可读    
    6.is_writable()判断文件是否可写    
    7.is_executable() 判断文件是否可执行    
    8.filectime()获取文件的创建时间    
    9.filemtime()获取文件更新时间    
    10.fileatime() 获取文件访问时间    
    11.fread()读取文件    
    12.opendir()打开文件夹    
    13.readdir()从目录句柄中读取条目    
    14.rmdir()删除文件夹    
    15.unlink()删除文件    
    16.rename()重命令文件夹或文件
 时间    
    17.date_default_timezone_set()设定用于一个脚本中所有日期时间函数的默认时区    
    18.intval() 取变量的整数值    
    19.
    
    
    
    
    其他用法:
        ...拿数组中的第一个值 func_get_args() 获取请求头的所以信息
        
        $this->test(...func_get_args());
        
        
        
        array_push() 追加
        $arr[] = [1];维度不一样

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References and returns of PHP functions

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