Comprobación de datos

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funciones is_

 function_exists()
 isset($valor)
 is_null($valor)
 is_bool($valor)
 is_numeric($valor)
 is_int($valor)
 is_float($valor)
 is_string($valor)
 is_scalar($valor)
 is_array($valor)
 is_callable($valor)
 is_object($valor)
 is_resource($valor)

funciones ctype

ctype_alnum($valor)
ctype_alpha($valor)
ctype_cntrl($valor)
ctype_digit($valor)
ctype_graph($valor)
ctype_lower($valor)
ctype_print($valor)
ctype_punct($valor)
ctype_space($valor)
ctype_upper($valor)
ctype_xdigit($cvalor)

funciones filter

 filter_var($valor [, $filtro [, $opciones]])

Ejemplos expresiones regulares

Un email

Idioma no válido.

Necesita especificar un idioma como esto: <source lang="html4strict">...</source>

lenguajes soportados para sintaxis remarcada:

4cs, 6502acme, 6502kickass, 6502tasm, 68000devpac, abap, actionscript, actionscript3, ada, algol68, apache, applescript, apt_sources, arm, asm, asp, asymptote, autoconf, autohotkey, autoit, avisynth, awk, bascomavr, bash, basic4gl, bf, bibtex, blitzbasic, bnf, boo, c, c_loadrunner, c_mac, caddcl, cadlisp, cfdg, cfm, chaiscript, cil, clojure, cmake, cobol, coffeescript, cpp, cpp-qt, csharp, css, cuesheet, d, dcl, dcpu16, dcs, delphi, diff, div, dos, dot, e, ecmascript, eiffel, email, epc, erlang, euphoria, f1, falcon, fo, fortran, freebasic, freeswitch, fsharp, gambas, gdb, genero, genie, gettext, glsl, gml, gnuplot, go, groovy, gwbasic, haskell, haxe, hicest, hq9plus, html4strict, html5, icon, idl, ini, inno, intercal, io, j, java, java5, javascript, jquery, kixtart, klonec, klonecpp, latex, lb, ldif, lisp, llvm, locobasic, logtalk, lolcode, lotusformulas, lotusscript, lscript, lsl2, lua, m68k, magiksf, make, mapbasic, matlab, mirc, mmix, modula2, modula3, mpasm, mxml, mysql, nagios, netrexx, newlisp, nsis, oberon2, objc, objeck, ocaml, ocaml-brief, octave, oobas, oorexx, oracle11, oracle8, oxygene, oz, parasail, parigp, pascal, pcre, per, perl, perl6, pf, php, php-brief, pic16, pike, pixelbender, pli, plsql, postgresql, povray, powerbuilder, powershell, proftpd, progress, prolog, properties, providex, purebasic, pycon, pys60, python, q, qbasic, rails, rebol, reg, rexx, robots, rpmspec, rsplus, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, spark, sparql, sql, stonescript, systemverilog, tcl, teraterm, text, thinbasic, tsql, typoscript, unicon, upc, urbi, uscript, vala, vb, vbnet, vedit, verilog, vhdl, vim, visualfoxpro, visualprolog, whitespace, whois, winbatch, xbasic, xml, xorg_conf, xpp, yaml, z80, zxbasic


<?php
$clean = array();

$email_pattern = '/^[^@\s<&>]+@([-a-z0-9]+\.)+[a-z]{2,}$/i';
if (preg_match($email_pattern, $_POST['email'])) 
{ 
    $clean['email'] = $_POST['email']; 
}
?>

Un valor

<?php
 
$clean = array();
 
switch ($_POST['color'])
{
    case 'red':
    case 'green':
    case 'blue':
        $clean['color'] = $_POST['color'];
        break;
}
?>

Un entero

<?php
 
$clean = array();
 
if ($_POST['num'] == strval(intval($_POST['num'])))
{
    $clean['num'] = $_POST['num'];
}
?>

Un Float

<?php
$clean = array();
 
if ($_POST['num'] == strval(floatval($_POST['num'])))
{
    $clean['num'] = $_POST['num'];
}
?>


Actividad

Icon activity.jpg

Actividad





Captura y manipulación de datos

 strip_tags($cadena)
 trim($cadena)
 htmlspecialchars()