Programming PHP

sql_regcase() function, 443
sqrt() function, 443
Squid proxy cache, 313
SquidGuard, adding redirection
logic, 314
srand() function, 443
sscanf() function, 92, 443
SSL (Secure Sockets Layer), 188
stacks, implementing with arrays, 138
standalone extensions, 325
start and end element handlers, 266
start value of strings, 90
starting point, graphics in PDF files, 249
stat() function, 443
state
debugger program for printing stack
trace, 138
maintaining between requests, 178–188
combining cookies and sessions, 187
cookies, 179–182
session tracking, 178
sessions, 182–187
statements
flow-control, 46–54
declare, 54
exit and return, 54
for, 52
foreach, 53
if, 47
switch, 48–50
while, 50–52
return, 63
semicolons (;) in, 18
static methods, 143
declaring, 144
static variables, 32, 65
status codes, HTTP response, 159
stdClass (reserved class name), 143
STD_PHP_INI_ENTRY() macro, 347
sticky forms, 167
sticky multi-valued parameters, HTML
forms, 170
storing data in arrays, 117–120
adding values to end of array, 118
assigning range of values, 119
getting array size, 119
padding, 119
strcasecmp() function, 87, 444
strchr() function, 94, 444
strcmp() function, 40, 87, 445
strcoll() function, 445
strcspn() function, 95, 445
streaming PDF documents, 236
strftime() function, 445
striking out text in PDF files, 241
(string) casting operator, 43
string literals, 25
strings, 25, 39, 72–115, 418
accessing individual characters, 79
breaking into chunks (example), 163
changing case of, 81
characters, converting into HTML entity
equivalents, 81
comparing, 39, 86–89
for approximate equality, 88
for equality, 26, 86
concatenating, 37
. operator, 38
strcat() function, 63
containing numbers, sorting in correct
order, 133
converting
between encodings, iconv
extension, 462
to numbers, 37
to/from URL encoding, 84, 224
C-string encoding, 85
extension functions returning, 338
functions for manipulating and
searching, 89–95, 377
exploding and imploding, 91
padding strings, 91
repeating strings, 91
reversing strings, 90
search functions, 93–95
splitting on regular expression pattern
boundary, 442
substrings, 89
tokenizing strings, 92
HTML, converting special characters to
entities, 81
HTML meta tags, extracting from, 84
HTML tags, removing from, 83
as keys to associative arrays, 116
length of, strlen() function (example), 61
null-terminated, in extensions, 331
printing, 75–79
with echo, 76
with print() function, 76
with printf() function, 76
with print_r() function, 78
with var_dump() function, 79
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