Code used by PHP to determine whether a file exists, is readable, and whether the directory exists

$file = ' jbxue.com.php '; if (is_readable ($file) = = False) { Die (' file does not exist or cannot be read '); } else { echo ' presence '; } ?> Copy Code The is_readable () function determines whether the specified file name is readable. Returns TRUE if the specified file or directory exists and is readable Example 2: $filename = ' jbxue.com.php '; if (file_exists ($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; } ?> Copy Code File_exists--Check whether a file or directory exists stating that bool File_exists (string filename) returns TRUE if the file or directory specified by filename is present, otherwise FALSE. Example 3: $file = ' jbxue.com.php '; if (Is_file ($file) = = False) { Die (' file does not exist or cannot be read '); } else { echo ' presence '; } ?> Copy Code Is_file--Determine if the given file name is a normal file description bool Is_file (string filename) returns TRUE if the file exists and is a normal file.

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