How to use php str_replace function parameter when it is an array

Introduction: This article introduces the system functions related to file operations in PHP. These functions are also very important. Below, Tianya still gives detailed examples of the more commonly used ones.

basename — Returns the file name part of the path

dirname — Returns the directory part of the path

string basename ( string $path [, string $suffix ] )

string dirname ( string $path )

Example, the code is as follows:

// PHP Blog http://www.php.cn

$path = "/home/httpd/www.phpcn/index.php";

echo basename($path);

echo basename($path, '. php');

echo basename($path, '.xxx');

echo dirname($path);

?>

//Result:

index.php

index

index. php

/home/httpd/www.phpfensi.com

Note: If the file name ends with the correct suffix, then this part will also be removed.

chgrp — change the group to which the file belongs

chown — change The owner of the file

chmod — change the file mode

bool chmod ( string $filename , int $mode )

Example, the code is as follows: chmod('/home/phpha.txt', 0755);

copy, copy file, the code is as follows:

if(copy('index.php', 'index.php.bak')){

echo 'copy success';

}

index.php survives in the current directory. bak file.

delete — see unlink or unset

unlink — delete the file

The code is as follows:

if(unlink('index.php.bak')){

echo 'unlink success ';

}

?>

deleted index.php.bak

disk_free_space — Returns the free space in the directory

disk_total_space — Returns the total disk size of a directory

diskfreespace — Alias ​​for disk_free_space

Code As follows:

//Under Windows:

echo disk_free_space("C:"), '
';

echo disk_total_space("C:");

? >

//Result: The number of bytes returned

17433419776

32218386432

fopen — Open a file or URL

fgets — Read a line from the file pointer

feof — Test whether the file pointer reaches end of file The location of

fread — read a file (safe for binary files)

fwrite — write a file (safe for binary files)

fclose — close an open file pointer

The code is as follows:

  $fp = fopen('hello.txt', 'r'); //Open a file

  $n = 1;

 while(!feof($fp)){

 echo $ n, ' - ', fgets($fp), '
'; //Read a line and output

  $n++;

}

 fclose($fp); //Close the file

?> Read in a line and parse CSV fields

fgetss — Read a line from the file pointer and filter out HTML tags

fputcsv — Format the line into CSV and write to the file pointer

fputs — Alias ​​for fwrite

The code is as follows:

$fp = fopen('hello.txt', 'r');

while(false !== ($char = fgetc($fp))){

echo $char, '-';

}

? & Gt;

// Output:

W-E-L-C-O-M-E-E-O-M-Y-O-O-G-: -H-T-P-P-B-L-O-O-H-P-H-A-A-. -c-o-m-

file_exists — Check whether the file or directory exists, the code is as follows:

if(file_exists('hello.txt')){

echo 'hello.txt exists';

} Else {

c el

& gt;

// Output:

hello.txt exist

File_get_Contents — reads the entire file

File_put_Contents — Write a string to a file

file — Read the entire file into an array

The code is as follows:

if($content = file_get_contents('hello.txt')){

file_put_contents('hello.txt.bak', $content);

}

?>

//Equivalent to copying a copy of hello.txt

if($content = file( 'hello.txt')){

 print_r($content);

}

?>

  //Array form, each line is an array member

 Array

 (

 [0] => ; Welcome to my blog:

[1] => http://www.phpfensi.com

)

fileatime — Get the last access time of the file

filectime — Get the inode modification time of the file

filegroup — Get the group of the file

fileinode — Get the inode of the file

filemtime — Get the file modification time

fileowner — Get the owner of the file

fileperms — Get the permissions of the file

filesize — Get the file size

filetype — Get The file type

code is as follows:

echo fileatime('hello.txt');

echo filectime('hello.txt');

echo filegroup('hello.txt');

echo filemtime('hello.txt');

echo fileowner('hello.txt');

echo substr(sprintf('%o', fileperms('hello.txt')), -4);

echo filesize('hello.txt');

echo filetype('hello.txt');

?>

//Output:

1353329003

1353329003

0

1353330002

0

file

fscanf — Format input from a file

fseek — Locate the file pointer

fstat — Get file information through the open file pointer

ftell — Return the read/write position of the file pointer

ftruncate — Truncate the file to The given length

glob — Finds the file path matching the pattern

is_dir — Determines whether the given file name is a directory

is_executable — Determines whether the given file name is executable

is_file — Determines whether the given file name is For a normal file

is_link — Determine whether the given file name is a symbolic link

is_readable — Determine whether the given file name is readable

is_uploaded_file — Determine whether the file was uploaded through HTTP POST

is_writable — Determine whether Whether the specified file name is writable

is_writeable — Alias ​​of is_writable

Explanation: The above functions are used to determine whether the file or directory meets the corresponding conditions and return TRUE or FALSE.

lchgrp — Changes group ownership of symlink

lchown — Changes user ownership of symlink

link — Establish a hard link

linkinfo — Get information about a connection

lstat — Give information about a file or symbolic link

mkdir — Create a new directory

move_uploaded_file — Move the uploaded Move the file to a new location

parse_ini_file — Parse a configuration file

pathinfo — Return file path information

pclose — Close the process file pointer

popen — Open the process file pointer

readfile — Output a file

readlink — Return The target of the symbolic link

realpath — Returns the normalized absolute path name

rename — Renames a file or directory

rewind — Rewinds the position of the file pointer

rmdir — Delete a directory

set_file_buffer — alias for stream_set_write_buffer

stat — gives information about a file

symlink — creates a symbolic link

tempnam — creates a file with a unique file name

tmpfile — creates a temporary file

touch — sets the file’s Access and modification time

umask — change the current umask

clearstatcache — clear the file status cache

Summary: In fact, there are so many file operation functions, most of which are not used. At the same time, you can see that these functions are similar to linux commands. How big.